Publications

The list of citations below is rendered by the papercite wordpress plugin, based on the bibtex exported by Zotero. To get the PDF files to export with the correct filenames, I had to hack the bibtex exporter ever so slightly.

You can easily see the bibtex of any single citation. However, I’ve also embedded the COinS bibliographic metadata of all of the publications into this page. If you click the import button on your Zotero (or other COinS compatible reference manager), it should show you a list of all publications, and you can select which ones you’d like to import.

Book

  • [URL] B. Preim and C. Botha, Visual computing for medicine, 2 ed., Morgan Kaufmann, 2013.
    [Bibtex]
    @book{preim_visual_2013,
    edition = {2},
    title = {Visual Computing for Medicine},
    isbn = {978-0124158733},
    url = {http://medvisbook.com/},
    abstract = {Visual Computing for Medicine, Second Edition, offers cutting-edge visualization techniques and their applications in medical diagnosis, education, and treatment. The book includes algorithms, applications, and ideas on achieving reliability of results and clinical evaluation of the techniques covered. Preim and Botha illustrate visualization techniques from research, but also cover the information required to solve practical clinical problems. They base the book on several years of combined teaching and research experience. This new edition includes six new chapters on treatment planning, guidance and training; an updated appendix on software support for visual computing for medicine; and a new global structure that better classifies and explains the major lines of work in the field. It offers a complete guide to visual computing in medicine, fully revamped and updated with new developments in the field. It is illustrated in full color. It includes a companion website offering additional content for professors, source code, algorithms, tutorials, videos, exercises, lessons, and more.},
    publisher = {Morgan Kaufmann},
    author = {Preim, Bernhard and Botha, Charl},
    year = {2013},
    note = {00000}
    }

This is the standard text for the field of Medical Visualization. Read more about the book by going to medvisbook.com.

Theses

  • [PDF] C. P. Botha, “Techniques and software architectures for medical visualisation and image processing,” PhD Thesis, 2005.
    [Bibtex]
    @phdthesis{botha_techniques_2005,
    title = {Techniques and Software Architectures for Medical Visualisation and Image Processing},
    lccn = {0006},
    school = {Delft University of Technology},
    author = {Botha, Charl Pieter},
    year = {2005},
    note = {00009},
    file = {Botha - 2005 - Techniques and Software Architectures for Medical .pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/F3A4KFCU/Botha - 2005 - Techniques and Software Architectures for Medical .pdf:application/pdf}
    }
  • [PDF] C. P. Botha, “An on-line machine vision flotation froth analysis platform,” PhD Thesis, 1999.
    [Bibtex]
    @phdthesis{botha_-line_1999,
    title = {An On-Line Machine Vision Flotation Froth Analysis Platform},
    school = {University of Stellenbosch},
    author = {Botha, Charl Pieter},
    year = {1999},
    note = {00002 {M.Sc.} thesis},
    file = {Botha - 1999 - An On-Line Machine Vision Flotation Froth Analysis Platform.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/EXMAAEVD/Botha - 1999 - An On-Line Machine Vision Flotation Froth Analysis Platform.pdf:application/pdf}
    }

Don’t be fooled by Zotero’s exporter: I wrote one Ph.D. thesis on medical visualization and one M.Sc. thesis on froth. Yes froth.

Journal Articles

2013

  • [PDF] [URL] D. F. Malan, C. P. Botha, and E. R. Valstar, “Voxel classification and graph cuts for automated segmentation of pathological periprosthetic hip anatomy,” International journal of computer assisted radiology and surgery, vol. 8, p. 63—74, 2013.
    [Bibtex]
    @article{malan_voxel_2013,
    title = {Voxel classification and graph cuts for automated segmentation of pathological periprosthetic hip anatomy},
    volume = {8},
    issn = {1861-6410, 1861-6429},
    lccn = {0000},
    url = {http://www.springerlink.com/content/e434940v78n20385/},
    doi = {10.1007/s11548-012-0671-z},
    abstract = {Purpose
    Automated patient-specific image-based segmentation of tissues surrounding aseptically loose hip prostheses is desired. For this we present an automated segmentation pipeline that labels periprosthetic tissues in computed tomography ({CT).} The intended application of this pipeline is in pre-operative planning.
    Methods
    Individual voxels were classified based on a set of automatically extracted image features. Minimum-cost graph cuts were computed on the classification results. The graph-cut step enabled us to enforce geometrical containment constraints, such as cortical bone sheathing the femur’s interior. The solution’s novelty lies in the combination of voxel classification with multilabel graph cuts and in the way label costs were defined to enforce containment constraints.
    Results
    The segmentation pipeline was tested on a set of twelve manually segmented clinical {CT} volumes. The distribution of healthy tissue and bone cement was automatically determined with sensitivities greater than 82\% and pathological fibrous interface tissue with a sensitivity exceeding 73\%. Specificity exceeded 96\% for all tissues.
    Conclusions
    The addition of a graph-cut step improved segmentation compared to voxel classification alone. The pipeline described in this paper represents a practical approach to segmenting multitissue regions from {CT.}},
    urldate = {2012-01-29},
    journal = {International Journal of Computer Assisted Radiology and Surgery},
    author = {Malan, Daniel F. and Botha, Charl P. and Valstar, Edward R.},
    year = {2013},
    note = {00001},
    pages = {63---74},
    file = {International Journal of Computer Assisted Radiology and Surgery, Online First™ - SpringerLink:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/FV6ZSETK/e434940v78n20385.html:text/html;Malan et al. - 2012 - Voxel classification and graph cuts for automated .pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/5SGKE7AD/Malan et al. - 2012 - Voxel classification and graph cuts for automated .pdf:application/pdf}
    }
  • [PDF] O. Dzyubachyk, J. Blaas, C. P. Botha, M. Staring, M. Reijnierse, J. L. Bloem, R. J. van der Geest, and B. {P. F. }. Lelieveldt, “Comparative exploration of whole-body MR through locally rigid transforms,” International journal of computer assisted radiology and surgery, 2013.
    [Bibtex]
    @article{dzyubachyk_comparative_2013,
    title = {Comparative Exploration of Whole-Body {MR} through Locally Rigid Transforms},
    lccn = {0000},
    journal = {International Journal of Computer Assisted Radiology and Surgery},
    author = {Dzyubachyk, Oleh and Blaas, Jorik and Botha, Charl P. and Staring, Marius and Reijnierse, Monique and Bloem, Johan L. and van der Geest, Rob J. and Lelieveldt, Boudewijn {P.F.}},
    year = {2013},
    note = {00000},
    file = {2013_j_IJCARS.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/A76BVWW4/2013_j_IJCARS.pdf:application/pdf}
    }
  • [PDF] [URL] {A. C. }. Kraima, {N. N. }. Smit, D. Jansma, C. Wallner, {R. L. A. W. }. Bleys, {C. J. H. }. van de Velde, {C. P. }. Botha, and {M. C. }. {DeRuiter}, “Toward a highly-detailed 3D pelvic model: approaching an ultra-specific level for surgical simulation and anatomical education,” Clinical anatomy, vol. 26, iss. 3, p. 333–338, 2013.
    [Bibtex]
    @article{kraima_toward_2013,
    title = {Toward a highly-detailed {3D} pelvic model: Approaching an ultra-specific level for surgical simulation and anatomical education},
    volume = {26},
    copyright = {Copyright © 2012 Wiley Periodicals, Inc.},
    issn = {1098-2353},
    shorttitle = {Toward a highly-detailed {3D} pelvic model},
    url = {http://onlinelibrary.wiley.com/doi/10.1002/ca.22207/abstract},
    doi = {10.1002/ca.22207},
    abstract = {The surgical anatomy of the pelvis is highly complex. Anorectal and urogenital dysfunctions occur frequently after pelvic oncological surgery and are mainly caused by surgical damage of the autonomic nerves. A highly-detailed {3D} pelvic model could increase the anatomical knowledge and form a solid basis for a surgical simulation system. Currently, pelvic surgeons still rely on the preoperative interpretation of {2D} diagnostic images. With a {3D} simulation system, pelvic surgeons could simulate and train different scenes to enhance their preoperative knowledge and improve surgical outcome. To substantially enrich pelvic surgery and anatomical education, such a system must provide insight into the relation between the autonomic network, the lymphatic system, and endopelvic fasciae. Besides {CT} and {MR} images, Visible Human Datasets ({VHDs)} are widely used for {3D} modeling, due to the high degree of anatomical detail represented in the cryosectional images. However, key surgical structures cannot be fully identified using {VHDs} and radiologic imaging techniques alone. Several unsolved anatomical problems must be elucidated as well. Therefore, adequate analysis on a microscopic level is inevitable. The development of a comprehensive anatomical atlas of the pelvis is no straightforward task. Such an endeavor involves several anatomical and technical challenges. This article surveys all existing {3D} pelvic models, focusing on the level of anatomical detail. The use of {VHDs} in the {3D} reconstruction of a highly-detailed pelvic model and the accompanying anatomical challenges will be discussed Clin. Anat., 2013. © 2012 Wiley Periodicals, Inc.},
    language = {en},
    number = {3},
    urldate = {2013-12-21},
    journal = {Clinical Anatomy},
    author = {Kraima, {A.C.} and Smit, {N.N.} and Jansma, D. and Wallner, C. and Bleys, {R.L.A.W.} and Velde, {C.J.H.} van de and Botha, {C.P.} and {DeRuiter}, {M.C.}},
    year = {2013},
    note = {00000},
    pages = {333–338},
    file = {kraima2013.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/XFKPU5V5/kraima2013.pdf:application/pdf;Snapshot:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/SMPBHMQP/abstract;jsessionid=A82469E1875775CB816E47A13673DD1A.html:text/html}
    }

2012

  • [PDF] [URL] D. F. Malan, C. P. Botha, G. Kraaij, R. M. S. Joemai, H. J. L. Heide, R. G. H. H. Nelissen, and E. R. Valstar, “Measuring femoral lesions despite CT metal artefacts: a cadaveric study,” Skeletal radiology, vol. 41, iss. 5, pp. 547-555, 2012.
    [Bibtex]
    @article{malan_measuring_2012,
    title = {Measuring femoral lesions despite {CT} metal artefacts: a cadaveric study},
    volume = {41},
    issn = {0364-2348, 1432-2161},
    lccn = {0000},
    shorttitle = {Measuring femoral lesions despite {CT} metal artefacts},
    url = {http://www.springerlink.com/content/b324511urm460415/},
    doi = {10.1007/s00256-011-1223-2},
    number = {5},
    urldate = {2011-11-07},
    journal = {Skeletal Radiology},
    author = {Malan, Daniel F. and Botha, Charl P. and Kraaij, Gert and Joemai, Raoul M. S. and Heide, Huub J. L. and Nelissen, Rob G. H. H. and Valstar, Edward R.},
    year = {2012},
    note = {00003},
    pages = {547--555},
    file = {Malan et al. - 2011 - Measuring femoral lesions despite CT metal artefac.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/7V2PTT25/Malan et al. - 2011 - Measuring femoral lesions despite CT metal artefac.pdf:application/pdf;Malan et al. - 2012 - Measuring femoral lesions despite CT metal artefac.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/W929C4RD/Malan et al. - 2012 - Measuring femoral lesions despite CT metal artefac.pdf:application/pdf;SpringerLink - Skeletal Radiology, Online First™:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/XHGBZ7F3/b324511urm460415.html:text/html}
    }
  • [PDF] [URL] C. P. Botha, B. Preim, A. Kaufman, S. Takahashi, and A. Ynnerman, “From individual to population: challenges in medical visualization,” arXiv:1206.1148, 2012.
    [Bibtex]
    @article{botha_individual_2012,
    title = {From individual to population: Challenges in Medical Visualization},
    lccn = {0001},
    shorttitle = {From individual to population},
    url = {http://charlbotha.com/publications/botha_individual_2012/},
    abstract = {In this paper, we first give a high-level overview of medical visualization development over the past 30 years, focusing on key developments and the trends that they represent. During this discussion, we will refer to a number of key papers that we have also arranged on the medical visualization research timeline. Based on the overview and our observations of the field, we then identify and discuss the medical visualization research challenges that we foresee for the coming decade.},
    urldate = {2012-08-13},
    journal = {{arXiv:1206.1148}},
    author = {Botha, Charl P. and Preim, Bernhard and Kaufman, Arie and Takahashi, Shigeo and Ynnerman, Anders},
    month = jun,
    year = {2012},
    note = {00001},
    file = {arXiv.org Snapshot:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/A3XMVTDH/1206.html:text/html;Botha et al. - 2012 - From individual to population Challenges in Medic.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/7XNP4QK5/Botha et al. - 2012 - From individual to population Challenges in Medic.pdf:application/pdf}
    }
  • [PDF] [URL] H. Pfister, V. Kaynig, C. P. Botha, S. Bruckner, V. J. Dercksen, H. Hege, and J. B. T. M. Roerdink, “Visualization in connectomics,” arXiv:1206.1428, 2012.
    [Bibtex]
    @article{pfister_visualization_2012,
    title = {Visualization in Connectomics},
    lccn = {0001},
    url = {http://arxiv.org/abs/1206.1428},
    abstract = {Connectomics is a field of neuroscience that analyzes neuronal connections. A connectome is a complete map of a neuronal system, comprising all neuronal connections between its structures. The term "connectome" is close to the word "genome" and implies completeness of all neuronal connections, in the same way as a genome is a complete listing of all nucleotide sequences. The goal of connectomics is to create a complete representation of the brain's wiring. Such a representation is believed to increase our understanding of how functional brain states emerge from their underlying anatomical structure. Furthermore, it can provide important information for the cure of neuronal dysfunctions like schizophrenia or autism. In this paper, we review the current state-of-the-art of visualization and image processing techniques in the field of connectomics and describe some remaining challenges.},
    urldate = {2012-08-13},
    journal = {{arXiv:1206.1428}},
    author = {Pfister, Hanspeter and Kaynig, Verena and Botha, Charl P. and Bruckner, Stefan and Dercksen, Vincent J. and Hege, Hans-Christian and Roerdink, Jos B. T. M.},
    month = jun,
    year = {2012},
    note = {00001},
    file = {arXiv.org Snapshot:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/VI5JED62/1206.html:text/html;Pfister et al. - 2012 - Visualization in Connectomics.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/2GMZDGVA/Pfister et al. - 2012 - Visualization in Connectomics.pdf:application/pdf}
    }
  • [PDF] [URL] C. Godeschalk-Slagboom, R. van der Geest, K. Zeppenfeld, and C. Botha, “Cardiac MRI visualization for ventricular tachycardia ablation,” International journal of computer assisted radiology and surgery, pp. 1-15, 2012.
    [Bibtex]
    @article{godeschalk-slagboom_cardiac_2012,
    title = {Cardiac {MRI} visualization for ventricular tachycardia ablation},
    issn = {1861-6410},
    lccn = {0000},
    url = {http://www.springerlink.com/content/n766351h83w05128/abstract/},
    doi = {10.1007/s11548-012-0776-4},
    abstract = {Objective The integrated visualization of cardiac {MRI} during a ventricular tachycardia ({VT)} mapping and ablation procedure would provide improved catheter guidance and tissue assessment. We developed a system for and explored the added value of simultaneous visualization of intracardiac voltage measurements and {MRI-derived} myocardial scar information during {VT} ablation procedures. Method We propose the use of a synchronized {3D} and {2D} view. In {3D}, the catheter will be guided optimally by assessing {3D} scar characteristics and its relation to the ventricular anatomy. In {2D}, a detailed assessment of the tissue can be made. We developed several {3D} visualization techniques, including volume rendering of the scar and myocardial surfaces colored according to the voltage measurements. We also visualized context structures in the heart. For the {2D} view, we proposed showing three adjacent slices simultaneously. To link the {3D} with the {2D} view, we added a linking plane and linking contours; the slice level shown in the {2D} view is indicated in the {3D} view. Results We evaluated our method via a case study during which we simulated the visual environment of an ablation procedure. The {MRI-based} volume rendering of scar tissue and the linking between the {3D} and {2D} views were both positively received. However, the visualization of the voltage measurements was found to be hard to interpret, partly due to the perceptually suitable but non-standard colormap. Conclusions Based on this study, we can conclude that our approach of displaying {MRI} data and integrating it with voltage measurements has potential to improve {VT} ablation procedures.},
    urldate = {2012-07-23},
    journal = {International Journal of Computer Assisted Radiology and Surgery},
    author = {Godeschalk-Slagboom, Corine and van der Geest, Rob and Zeppenfeld, Katja and Botha, Charl},
    year = {2012},
    note = {00000},
    pages = {1--15},
    file = {Godeschalk-Slagboom et al. - Cardiac MRI visualization for ventricular tachycar.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/XQTZ9HAG/Godeschalk-Slagboom et al. - Cardiac MRI visualization for ventricular tachycar.pdf:application/pdf;SpringerLink Snapshot:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/R7KU2EWW/abstract.html:text/html}
    }
  • [PDF] [URL] T. Kroes, F. H. Post, and C. P. Botha, “Exposure render: an interactive photo-realistic volume rendering framework,” PLoS ONE, vol. 7, iss. 7, p. e38586, 2012.
    [Bibtex]
    @article{kroes_exposure_2012,
    title = {Exposure Render: An Interactive Photo-Realistic Volume Rendering Framework},
    volume = {7},
    lccn = {0001},
    shorttitle = {Exposure Render},
    url = {http://dx.doi.org/10.1371/journal.pone.0038586},
    doi = {10.1371/journal.pone.0038586},
    abstract = {The field of volume visualization has undergone rapid development during the past years, both due to advances in suitable computing hardware and due to the increasing availability of large volume datasets. Recent work has focused on increasing the visual realism in Direct Volume Rendering ({DVR)} by integrating a number of visually plausible but often effect-specific rendering techniques, for instance modeling of light occlusion and depth of field. Besides yielding more attractive renderings, especially the more realistic lighting has a positive effect on perceptual tasks. Although these new rendering techniques yield impressive results, they exhibit limitations in terms of their exibility and their performance. Monte Carlo ray tracing ({MCRT)}, coupled with physically based light transport, is the de-facto standard for synthesizing highly realistic images in the graphics domain, although usually not from volumetric data. Due to the stochastic sampling of {MCRT} algorithms, numerous effects can be achieved in a relatively straight-forward fashion. For this reason, we have developed a practical framework that applies {MCRT} techniques also to direct volume rendering ({DVR).} With this work, we demonstrate that a host of realistic effects, including physically based lighting, can be simulated in a generic and flexible fashion, leading to interactive {DVR} with improved realism. In the hope that this improved approach to {DVR} will see more use in practice, we have made available our framework under a permissive open source license.},
    number = {7},
    urldate = {2012-07-23},
    journal = {{PLoS} {ONE}},
    author = {Kroes, Thomas and Post, Frits H. and Botha, Charl P.},
    month = jul,
    year = {2012},
    note = {00012},
    pages = {e38586},
    file = {Kroes et al. - 2012 - Exposure Render An Interactive Photo-Realistic Vo.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/2ES9A842/Kroes et al. - 2012 - Exposure Render An Interactive Photo-Realistic Vo.pdf:application/pdf}
    }

2011

  • [PDF] [URL] K. Sihan, C. Botha, F. Post, S. de Winter, N. Gonzalo, E. Regar, P. W. Serruys, R. Hamers, and N. Bruining, “Retrospective image-based gating of intracoronary optical coherence tomography: implications for quantitative analysis,” EuroIntervention: journal of EuroPCR in collaboration with the working group on interventional cardiology of the european society of cardiology, vol. 6, iss. 9, pp. 1098-1103, 2011.
    [Bibtex]
    @article{sihan_retrospective_2011,
    title = {Retrospective image-based gating of intracoronary optical coherence tomography: implications for quantitative analysis},
    volume = {6},
    issn = {1969-6213},
    lccn = {0002},
    shorttitle = {Retrospective image-based gating of intracoronary optical coherence tomography},
    url = {http://www.ncbi.nlm.nih.gov/pubmed/21518683},
    doi = {10.4244/EIJV6I9A191},
    abstract = {{AIMS}
    Images acquired of coronary vessels during a pullback of time-domain optical coherence tomography ({OCT)} are influenced by the dynamics of the heart. This study explores the feasibility of applying an in-house developed retrospective image-based gating method for {OCT} and the influence of catheter dislocation and luminal changes during the cardiac cycle on the outcome of quantitative {OCT} ({QOCT).}
    {METHODS} {AND} {RESULTS}
    The gating method was developed using Matlab (The Mathworks, Natick, {MA}, {USA)} and operates in a fully-automatic manner. {OCT} image data of 20 randomly selected patients, acquired with a commercially available system (Lightlab Imaging, Westford, {MA}, {USA)}, were pulled from our {OCT} database for development and validation. Twelve of the 20 datasets could be gated; the other eight pullbacks could not be gated due to a lack of motion induced artefacts. Computations required approximately 30 minutes/dataset. Quantitative comparisons between the gated and the non-gated {QOCT} results showed significant differences for mean areas and volumes (p {\textless}0.001) and mean relative differences of -11\% (range -2 up to -20\%) for lumen areas (gated) and -13\% (range -5 up to -24\%) for volumes.
    {CONCLUSIONS}
    Retrospective image-based time-domain {OCT} gating in the presence of motion induced artefacts is feasible. Significant changes in coronary lumen dimensions during the cardiac cycle were observed by {OCT} and in consequence, quantitative gated {OCT} analysis showed significant differences compared to non-gated {QOCT} analyses.},
    number = {9},
    urldate = {2011-09-25},
    journal = {{EuroIntervention:} Journal of {EuroPCR} in Collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology},
    author = {Sihan, Kenji and Botha, Charl and Post, Frits and de Winter, Sebastiaan and Gonzalo, Nieves and Regar, Evelyn and Serruys, Patrick W and Hamers, Ronald and Bruining, Nico},
    month = apr,
    year = {2011},
    note = {00003 {PMID:} 21518683},
    keywords = {Algorithms, Artifacts, Cardiac-Gated Imaging Techniques, Coronary Artery Disease, Feasibility Studies, Humans, Image Interpretation, Computer-Assisted, Netherlands, Predictive Value of Tests, Regression Analysis, Reproducibility of Results, Retrospective Studies, Severity of Illness Index, Software, Tomography, Optical Coherence},
    pages = {1098--1103},
    file = {Sihan et al. - 2011 - Retrospective image-based gating of intracoronary optical coherence tomography implications for quantitative analysis.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/7F7RS8AM/Sihan et al. - 2011 - Retrospective image-based gating of intracoronary optical coherence tomography implications for quantitative analysis.pdf:application/pdf}
    }
  • [PDF] [URL] F. V. Paulovich, D. M. Eler, J. Poco, C. P. Botha, R. Minghim, and L. G. Nonato, “Piecewise laplacian‐based projection for interactive data exploration and organization,” Computer graphics forum, vol. 30, iss. 3, pp. 1091-1100, 2011.
    [Bibtex]
    @article{paulovich_piecewise_2011,
    title = {Piecewise Laplacian‐based Projection for Interactive Data Exploration and Organization},
    volume = {30},
    issn = {1467-8659},
    lccn = {0004},
    url = {http://onlinelibrary.wiley.com/doi/10.1111/j.1467-8659.2011.01958.x/abstract},
    doi = {10.1111/j.1467-8659.2011.01958.x},
    abstract = {Multidimensional projection has emerged as an important visualization tool in applications involving the visual analysis of high-dimensional data. However, high precision projection methods are either computationally expensive or not flexible enough to enable feedback from user interaction into the projection process. A built-in mechanism that dynamically adapts the projection based on direct user intervention would make the technique more useful for a larger range of applications and data sets. In this paper we propose the Piecewise Laplacian-based Projection ({PLP)}, a novel multidimensional projection technique, that, due to the local nature of its formulation, enables a versatile mechanism to interact with projected data and to allow interactive changes to alter the projection map dynamically, a capability unique of this technique. We exploit the flexibility provided by {PLP} in two interactive projection-based applications, one designed to organize pictures visually and another to build music playlists. These applications illustrate the usefulness of {PLP} in handling high-dimensional data in a flexible and highly visual way. We also compare {PLP} with the currently most promising projections in terms of precision and speed, showing that it performs very well also according to these quality criteria.},
    language = {en},
    number = {3},
    urldate = {2011-11-07},
    journal = {Computer Graphics Forum},
    author = {Paulovich, F. V and Eler, D. M and Poco, J. and Botha, C. P and Minghim, R. and Nonato, L. G},
    month = jun,
    year = {2011},
    note = {00000},
    pages = {1091--1100},
    file = {Wiley Full Text PDF:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/2E8HBPRN/Paulovich et al. - 2011 - Piece wise Laplacian‐based Projection for Interact.pdf:application/pdf}
    }
  • B. Preim and C. P. Botha, “Special section on visual computing in biology and medicine (guest editorship),” Computers & graphics, vol. 35, iss. 2, p. 218–430, 2011.
    [Bibtex]
    @article{preim_special_2011,
    title = {Special Section on Visual Computing in Biology and Medicine (Guest Editorship)},
    volume = {35},
    lccn = {0000},
    number = {2},
    journal = {Computers \& Graphics},
    author = {Preim, Bernhard and Botha, Charl P.},
    year = {2011},
    note = {00000},
    pages = {218–430}
    }
  • [PDF] [URL] S. Busking, C. P. Botha, L. Ferrarini, J. Milles, and F. H. Post, “Image-based rendering of intersecting surfaces for dynamic comparative visualization,” The visual computer, vol. 27, pp. 347-363, 2011.
    [Bibtex]
    @article{busking_image-based_2011,
    title = {Image-based rendering of intersecting surfaces for dynamic comparative visualization},
    volume = {27},
    issn = {0178-2789, 1432-2315},
    lccn = {0001},
    url = {http://dl.acm.org/citation.cfm?id=1967417},
    doi = {10.1007/s00371-010-0541-z},
    abstract = {Nested or intersecting surfaces are proven techniques for visualizing shape differences between
    static {3D} objects {\textbackslash}{cite\{Weigle2005\}.} In this paper we present an image-based formulation for t
    hese techniques that extends their use to dynamic
    scenarios, in which surfaces can be manipulated or even deformed interactively. The formulation is based on our new layered rendering pipeline, a generic image-based approach for rendering nested surfaces based on depth peeling and deferred shading.
    We use layered rendering to enhance the intersecting surfaces visualization. In addition to enabling interactive performance, our enhancements address several limitations of the original technique. Contours remove ambiguity regarding the shape of intersections. Local distances between the surfaces can be visualized at any point using either depth fogging or distance fields: Depth fogging is used as a cue for the distance between two surfaces in the viewing direction, whereas closest-point distance measures are visualized interactively by evaluating one surface's distance field on the other surface. Furthermore, we use these measures to define a three-way surface segmentation, which visualizes regions of growth, shrinkage, and no change of a test surface compared with a reference surface.
    Finally, we demonstrate an application of our techniques in the visualization of statistical shape models. We evaluate our techniques based on feedback provided by medical image analysis researchers, who are experts in working with such models.},
    urldate = {2011-09-25},
    journal = {The Visual Computer},
    author = {Busking, Stef and Botha, Charl P. and Ferrarini, Luca and Milles, Julien and Post, Frits H.},
    year = {2011},
    note = {00005},
    keywords = {Biomedical imaging, brain, Computer graphics, data visualisation, Data visualization, Magnetic resonance imaging, Tensile stress},
    pages = {347--363},
    file = {Busking et al. - 2011 - Image-based rendering of intersecting surfaces for.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/XI5VUFX9/Busking et al. - 2011 - Image-based rendering of intersecting surfaces for.pdf:application/pdf;Image-based rendering of intersecting surfaces for dynamic comparative visualization:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/EWCTNGA9/citation.html:text/html}
    }
  • [PDF] [URL] X. Zhang, J. Blaas, C. Botha, P. Reischig, A. Bravin, and J. Dik, “Process for the 3D virtual reconstruction of a microcultural heritage artifact obtained by synchrotron radiation CT technology using open source and free software,” Journal of cultural heritage, 2011.
    [Bibtex]
    @article{zhang_process_2011,
    title = {Process for the {3D} virtual reconstruction of a microcultural heritage artifact obtained by synchrotron radiation {CT} technology using open source and free software},
    issn = {1296-2074},
    lccn = {0000},
    url = {http://www.sciencedirect.com/science/article/pii/S1296207411000860},
    doi = {10.1016/j.culher.2011.08.004},
    abstract = {Computer tomography ({CT)} technology has greatly contributed to the feasibility and convenience of detecting and visualizing the internal material constitution and geometrical fabrication of museum artifacts. This paper presents a case study of {3D} virtual reconstruction for the {CT-acquisition-based} study of a cultural heritage artifact. It documents the complete procedure, including the preprocessing, segmentation and visualization of the data by providing coarse interactive exploration and integrated high-quality renderings. A parallel aim achieved was to use open source tools and free software for segmentation and visualization, thus providing full transparency of the adopted methodology and {3D} visualization methods, and a cost effective solution for ordinary {CPU-based} {PC} users. Furthermore, the challenges of the large data volumes involved have been addressed using preprocessing, a segmentation scheme and linked front-to-back management to keep interaction and high-quality rendering available, thus achieving corresponding demands.},
    urldate = {2011-12-01},
    journal = {Journal of Cultural Heritage},
    author = {Zhang, Xi and Blaas, Jorik and Botha, Charl and Reischig, Peter and Bravin, Alberto and Dik, Joris},
    year = {2011},
    note = {00000},
    file = {ScienceDirect Snapshot:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/HJXNTA63/S1296207411000860.html:text/html;Zhang et al. - Process for the 3D virtual reconstruction of a mic.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/2P9AWKSJ/Zhang et al. - Process for the 3D virtual reconstruction of a mic.pdf:application/pdf}
    }

2010

  • [PDF] S. Busking, C. P. Botha, and F. H. Post, “Dynamic multi-view exploration of shape spaces,” Computer graphics forum, vol. 29, iss. 3, p. 973–982, 2010.
    [Bibtex]
    @article{busking_dynamic_2010,
    title = {Dynamic Multi-View Exploration of Shape Spaces},
    volume = {29},
    lccn = {0003},
    doi = {10.1111/j.1467-8659.2009.01684.x},
    number = {3},
    journal = {Computer Graphics Forum},
    author = {Busking, Stef and Botha, Charl P. and Post, Frits H.},
    year = {2010},
    note = {00008},
    pages = {973–982},
    file = {Busking et al. - 2010 - Dynamic Multi-View Exploration of Shape Spaces.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/8TMUTMH7/Busking et al. - 2010 - Dynamic Multi-View Exploration of Shape Spaces.pdf:application/pdf}
    }
  • [PDF] P. R. Krekel, E. R. Valstar, J. de Groot, F. H. Post, R. {G. H. H. }. Nelissen, and C. P. Botha, “Visual analysis of multi-joint kinematic data,” Computer graphics forum, vol. 29, iss. 3, p. 1123–1132, 2010.
    [Bibtex]
    @article{krekel_visual_2010,
    title = {Visual Analysis of Multi-Joint Kinematic Data},
    volume = {29},
    lccn = {0002},
    doi = {10.1111/j.1467-8659.2009.01681.x},
    number = {3},
    journal = {Computer Graphics Forum},
    author = {Krekel, Peter R. and Valstar, Edward R. and de Groot, Jurriaan and Post, Frits H. and Nelissen, Rob. {G.H.H.} and Botha, Charl P.},
    year = {2010},
    note = {00003},
    pages = {1123–1132},
    file = {Krekel2010a.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/545C56XI/Krekel2010a.pdf:application/pdf}
    }
  • [PDF] R. A. Lee, A. Van Zundert, C. P. Botha, A. L. Lataster, T. C. Van Zundert, W. G. Van Der Ham, and P. A. Wieringa, “The anatomy of the thoracic spinal canal in different postures: an MRI investigation,” Regional anesthesia and pain medicine, vol. 35, iss. 4, p. 364–369, 2010.
    [Bibtex]
    @article{lee_anatomy_2010,
    title = {The Anatomy of the Thoracic Spinal Canal in Different Postures: An {MRI} Investigation},
    volume = {35},
    lccn = {0000},
    doi = {0.1097/AAP.0b013e3181e8a344},
    abstract = {Background and Objectives: The goal of this study was to investigate, with magnetic resonance imaging, the human anatomic positions of the spinal canal (eg, spinal cord, thecal tissue) in various postures and identify possible implications from different patient positioning for neuraxial anesthetic practice. Method: Nine volunteers underwent magnetic resonance imaging in supine, laterally recumbent, and sitting (head-down) positions. Axial and sagittal slices of the thoracic and lumbar spine were measured for the relative distances between anatomic structures, including dura mater and spinal cord. Results: The posterior dura-spinal cord (midline) distance is on average greater than the anterior dura-spinal cord (midline) distance along the thoracic spinal column, irrespective of volunteer postures (P {\textless} 0.05). The separation of the dura mater and spinal cord is greatest posterior in the middle thoracic region compared with upper and lower thoracic levels for all postures of the volunteers (P {\textless} 0.05). By placing the patient in a head-down sitting posture (as commonly done in epidural and spinal anesthesia), the posterior separation of the dura mater and spinal cord is increased. Conclusions: The spinal cord follows the straightest line through the imposed geometry of the spinal canal. Accordingly, there is relatively more posterior separation of the cord and surrounding thecal tissue at midthoracic levels in the apex of the thoracic kyphosis. Placing a patient in a position that accentuates the thoracic curvature of the spine (ie, sitting head-down) increases the posterior separation of the spinal cord and dural sheath at thoracic levels.},
    number = {4},
    journal = {Regional Anesthesia and Pain Medicine},
    author = {Lee, Ruben A. and Van Zundert, Andre and Botha, Charl P. and Lataster, Arno L. and Van Zundert, Tom C. and Van Der Ham, Willem G. and Wieringa, Pieter A.},
    year = {2010},
    note = {00000},
    pages = {364–369},
    file = {Lee et al. - 2010 - The Anatomy of the Thoracic Spinal Canal in Different Postures An MRI Investigation.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/FZXH82VW/Lee et al. - 2010 - The Anatomy of the Thoracic Spinal Canal in Different Postures An MRI Investigation.pdf:application/pdf}
    }
  • [PDF] P. R. Krekel, E. R. Valstar, F. H. Post, P. M. Rozing, and C. P. Botha, “Combined surface and volume processing for fused joint segmentation,” The international journal for computer assisted radiology and surgery, vol. 5, iss. 3, p. 263–273, 2010.
    [Bibtex]
    @article{krekel_combined_2010,
    title = {Combined Surface and Volume Processing for Fused Joint Segmentation},
    volume = {5},
    lccn = {0000},
    doi = {10.1007/s11548-009-0400-4},
    abstract = {Purpose Segmentation of rheumatoid joints from {CT} images is a complicated task. The pathological state of the joint results in a non-uniform density of the bone tissue, with holes and irregularities complicating the segmentation process. For the specific case of the shoulder joint, existing segmentation techniques often fail and lead to poor results. This paper describes a novel method for the segmentation of these joints. Methods Given a rough surface model of the shoulder, a loop that encircles the joint is extracted by calculating the minimum curvature of the surface model. The intersection points of this loop with the separate {CT-slices} are connected by means of a path search algorithm. Inaccurate sections are corrected by iteratively applying a Hough transform to the segmentation result. Results As a qualitative measure we calculated the Dice coefficient and Hausdorff distances of the automatic segmentations and expert manual segmentations of {CT-scans} of ten severely deteriorated shoulder joints. For the humerus and scapula the median Dice coefficient was 98.9\% with an interquartile range ({IQR)} of 95.8–99.4 and 98.5\% ({IQR} 98.3–99.2\%), respectively. The median Hausdorff distances were 3.06 mm ({IQR} 2.30–4.14) and 3.92 mm ({IQR} 1.96 –5.92 mm), respectively. Conclusion The routine satisfies the criterion of our particular application to accurately segment the shoulder joint in under 2 min. We conclude that combining surface curvature, limited user interaction and iterative refinement via a Hough transform forms a satisfactory approach for the segmentation of severely damaged arthritic shoulder joints.},
    number = {3},
    journal = {The International Journal for Computer Assisted Radiology and Surgery},
    author = {Krekel, Peter R and Valstar, Edward R and Post, Frits H and Rozing, Piet M and Botha, Charl P},
    year = {2010},
    note = {00000},
    pages = {263–273},
    file = {Krekel et al. - 2010 - Combined Surface and Volume Processing for Fused J.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/URIMAASX/Krekel et al. - 2010 - Combined Surface and Volume Processing for Fused J.pdf:application/pdf}
    }
  • [PDF] P. Kok, M. Baiker, E. A. Hendriks, F. H. Post, J. Dijkstra, C. {W. G. M. }. Löwik, B. {P. F. }. Lelieveldt, and C. P. Botha, “Articulated planar reformation for change visualization in small animal imaging,” IEEE transactions on visualization and computer graphics, vol. 16, iss. 6, p. 1396–1404, 2010.
    [Bibtex]
    @article{kok_articulated_2010,
    title = {Articulated Planar Reformation for Change Visualization in Small Animal Imaging},
    volume = {16},
    lccn = {0000},
    doi = {10.1109/TVCG.2010.134},
    abstract = {The analysis of multi-timepoint whole-body small animal {CT} data is greatly complicated by the varying posture of the subject at different timepoints. Due to these variations, correctly relating and comparing corresponding regions of interest is challenging. In addition, occlusion may prevent effective visualization of these regions of interest. To address these problems, we have developed a method that fully automatically maps the data to a standardized layout of sub-volumes, based on an articulated atlas registration. We have dubbed this process articulated planar reformation, or {APR.} A sub-volume can be interactively selected for closer inspection and can be compared with the corresponding sub-volume at the other timepoints, employing a number of different comparative visualization approaches. We provide an additional tool that highlights possibly interesting areas based on the change of bone density between timepoints. Furthermore we allow visualization of the local registration error, to give an indication of the accuracy of the registration. We have evaluated our approach on a case that exhibits cancer-induced bone resorption.},
    number = {6},
    journal = {{IEEE} Transactions on Visualization and Computer Graphics},
    author = {Kok, Peter and Baiker, Martin and Hendriks, Emile A. and Post, Frits H. and Dijkstra, Jouke and Löwik, Clemens {W.G.M.} and Lelieveldt, Boudewijn {P.F.} and Botha, Charl P.},
    year = {2010},
    note = {00016},
    pages = {1396–1404},
    file = {Kok et al. - 2010 - Articulated Planar Reformation for Change Visualiz.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/NK3GAPR2/Kok et al. - 2010 - Articulated Planar Reformation for Change Visualiz.pdf:application/pdf}
    }
  • [PDF] [URL] S. Busking, C. P. Botha, and F. H. Post, “Example-based interactive illustration of multi-field datasets,” Computers & graphics, vol. 34, iss. 6, pp. 719-728, 2010.
    [Bibtex]
    @article{busking_example-based_2010,
    title = {Example-based interactive illustration of multi-field datasets},
    volume = {34},
    issn = {0097-8493},
    lccn = {0000},
    url = {http://www.sciencedirect.com/science/article/pii/S009784931000110X},
    doi = {10.1016/j.cag.2010.07.004},
    abstract = {Multi-fields are widely used in areas ranging from physical simulations to medical imaging. Illustrative visualization techniques can help to effectively communicate features of interest found in a given field. Current techniques for multi-field visualization are mostly focused on showing subsets of local attributes such as single values or vector directions, e.g., using colors, texture, streamlines or glyphs. Instead, we present an approach based on highlighting areas with similar characteristics, considering all attributes of the field.
    Our approach is example-based and interactive. A user simply selects a point within the field, upon which the system automatically derives the characteristic combination of attributes for that point. Our system then automatically creates a visualization highlighting areas within the field which are similar to the example point with respect to these characteristics. The visualizations are presented using sparse, illustrative techniques, using contours and colors to clearly delineate and identify separate areas. Users can interact with the visualizations in real-time, by moving the example point or, optionally, by changing the characteristics or adjusting other parameters used to determine similarity.},
    number = {6},
    urldate = {2011-11-09},
    journal = {Computers \& Graphics},
    author = {Busking, Stef and Botha, Charl P. and Post, Frits H.},
    month = dec,
    year = {2010},
    note = {00000},
    pages = {719--728},
    file = {Busking et al. - 2010 - Example-based interactive illustration of multi-fi.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/N8SZC852/Busking et al. - 2010 - Example-based interactive illustration of multi-fi.pdf:application/pdf;ScienceDirect Snapshot:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/XWBGCXE6/S009784931000110X.html:text/html}
    }

2009

  • [PDF] J. Blaas, C. P. Botha, E. Grundy, M. W. Jones, R. S. Laramee, and F. H. Post, “Smooth graphs for visual exploration of higher order state transitions,” IEEE transactions on visualization and computer graphics, vol. 15, iss. 16, 2009.
    [Bibtex]
    @article{blaas_smooth_2009,
    title = {Smooth graphs for visual exploration of higher order state transitions},
    volume = {15},
    lccn = {0005},
    number = {16},
    journal = {{IEEE} Transactions on Visualization and Computer Graphics},
    author = {Blaas, Jorik and Botha, Charl P. and Grundy, Edward and Jones, Mark W. and Laramee, Robert S. and Post, Frits H.},
    year = {2009},
    note = {00017},
    file = {Blaas et al. - 2009 - Smooth graphs for visual exploration of higher ord.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/99CBVNMQ/Blaas et al. - 2009 - Smooth graphs for visual exploration of higher ord.pdf:application/pdf}
    }
  • [PDF] P. R. Krekel, P. W. de Bruin, E. R. Valstar, F. H. Post, P. M. Rozing, and C. P. Botha, “Evaluation of bone impingement prediction in pre-operative planning for shoulder arthroplasty,” Journal of engineering in medicine, vol. 223, iss. 7, p. 813–822, 2009.
    [Bibtex]
    @article{krekel_evaluation_2009,
    title = {Evaluation of Bone Impingement Prediction in Pre-operative Planning for Shoulder Arthroplasty},
    volume = {223},
    lccn = {0003},
    doi = {10.1243/09544119JEIM531},
    number = {7},
    journal = {Journal of Engineering in Medicine},
    author = {Krekel, Peter R and de Bruin, Paul W and Valstar, Edward R and Post, Frits H and Rozing, Piet M and Botha, Charl P},
    year = {2009},
    note = {00005},
    pages = {813–822},
    file = {Krekel et al. - 2009 - Evaluation of Bone Impingement Prediction in Pre-o.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/C4GPDGXI/Krekel et al. - 2009 - Evaluation of Bone Impingement Prediction in Pre-o.pdf:application/pdf}
    }
  • [PDF] P. Reischig, J. Blaas, C. Botha, A. Bravin, L. Porra, C. Nemoz, A. Wallert, and J. Dik, “A note on medieval microfabrication: the visualization of a prayer nut by synchrotron-based computer x-ray tomography,” Journal of synchrotron radiation, vol. 16, p. 310–313, 2009.
    [Bibtex]
    @article{reischig_note_2009,
    title = {A note on medieval microfabrication: the visualization of a prayer nut by synchrotron-based computer X-ray tomography},
    volume = {16},
    lccn = {0001},
    doi = {10.1107/S0909049508043082},
    journal = {Journal of Synchrotron Radiation},
    author = {Reischig, Peter and Blaas, Jorik and Botha, Charl and Bravin, Alberto and Porra, Liisa and Nemoz, Christian and Wallert, Arie and Dik, Joris},
    year = {2009},
    note = {00005},
    pages = {310–313},
    file = {Reischig et al. - 2009 - A note on medieval microfabrication the visualization of a prayer nut by synchrotron-based computer X-ray tomography.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/X7NIJADM/Reischig et al. - 2009 - A note on medieval microfabrication the visualization of a prayer nut by synchrotron-based computer X-ray tomography.pdf:application/pdf}
    }
  • [PDF] S. Busking, C. P. Botha, and F. H. Post, “Direct visualization of deformation in volumes,” Computer graphics forum, vol. 28, iss. 3, p. 799–806, 2009.
    [Bibtex]
    @article{busking_direct_2009,
    title = {Direct Visualization of Deformation in Volumes},
    volume = {28},
    lccn = {0002},
    number = {3},
    journal = {Computer Graphics Forum},
    author = {Busking, Stef and Botha, Charl P. and Post, Frits H.},
    year = {2009},
    note = {00002},
    pages = {799–806},
    file = {Busking2009.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/CZWHJNSX/Busking2009.pdf:application/pdf}
    }
  • [PDF] [URL] K. Sihan, C. Botha, F. Post, S. de Winter, N. Gonzalo, E. Regar, P. J. W. C. Serruys, R. Hamers, and N. Bruining, “Fully automatic three-dimensional quantitative analysis of intracoronary optical coherence tomography: method and validation.,” Catheter cardiovasc interv, vol. 74, p. 1058–1065, 2009.
    [Bibtex]
    @article{sihan_fully_2009,
    title = {Fully automatic three-dimensional quantitative analysis of intracoronary optical coherence tomography: method and Validation.},
    volume = {74},
    lccn = {0000},
    url = {http://dx.doi.org/10.1002/ccd.22125},
    doi = {10.1002/ccd.22125},
    abstract = {Objectives and background: Quantitative analysis of intracoronary optical coherence tomography ({OCT)} image data ({QOCT)} is currently performed by a time-consuming manual contour tracing process in individual {OCT} images acquired during a pullback procedure (frame-based method). To get an efficient quantitative analysis process, we developed a fully automatic three-dimensional ({3D)} lumen contour detection method and evaluated the results against those derived by expert human observers. Methods: The method was developed using Matlab (The Mathworks, Natick, {MA).} It incorporates a graphical user interface for contour display and, in the selected cases where this might be necessary, editing. {OCT} image data of 20 randomly selected patients, acquired with a commercially available system (Lightlab imaging, Westford, {MA)}, were pulled from our {OCT} database for validation. Results: A total of 4,137 {OCT} images were analyzed. There was no statistically significant difference in mean lumen areas between the two methods (5.03 +/- 2.16 vs. 5.02 +/- 2.21 mm(2); P = 0.6, human vs. automated). Regression analysis showed a good correlation with an r value of 0.99. The method requires an average 2-5 sec calculation time per {OCT} image. In 3\${\textbackslash}backslash\$\% of the detected contours an observer correction was necessary. Conclusion: Fully automatic lumen contour detection in {OCT} images is feasible with only a select few contours showing an artifact (3\${\textbackslash}backslash\$\%) that can be easily corrected. This {QOCT} method may be a valuable tool for future coronary imaging studies incorporating {OCT.} (c) 2009 Wiley-Liss, Inc.},
    journal = {Catheter Cardiovasc Interv},
    author = {Sihan, Kenji and Botha, Charl and Post, Frits and de Winter, Sebastiaan and Gonzalo, Nieves and Regar, Evelyn and Serruys, Patrick J W C and Hamers, Ronald and Bruining, Nico},
    month = may,
    year = {2009},
    note = {00000},
    pages = {1058–1065},
    file = {Sihan et al. - 2009 - Fully automatic three-dimensional quantitative analysis of intracoronary optical coherence tomography method and Validation.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/5MTU92D9/Sihan et al. - 2009 - Fully automatic three-dimensional quantitative analysis of intracoronary optical coherence tomography method and Validation.pdf:application/pdf}
    }

2008

  • [PDF] J. Blaas, C. P. Botha, and F. H. Post, “Extensions of parallel coordinates for interactive exploration of large multi-timepoint data sets,” IEEE transactions on visualization and computer graphics, vol. 14, iss. 6, p. 1436–1451, 2008.
    [Bibtex]
    @article{blaas_extensions_2008,
    title = {Extensions of Parallel Coordinates for Interactive Exploration of Large Multi-Timepoint Data Sets},
    volume = {14},
    lccn = {0010},
    doi = {10.1109/TVCG.2008.131},
    abstract = {Parallel coordinate plots ({PCPs)} are commonly used in information visualization to provide insight into multi-variate data. These plots help to spot correlations between variables. {PCPs} have been successfully applied to unstructured datasets up to a few millions of points. In this paper, we present techniques to enhance the usability of {PCPs} for the exploration of large, multi-timepoint volumetric data sets, containing tens of millions of points per timestep. The main difficulties that arise when applying {PCPs} to large numbers of data points are visual clutter and slow performance, making interactive exploration infeasible. Moreover, the spatial context of the volumetric data is usually lost. We describe techniques for preprocessing using data quantization and compression, and for fast {GPU-based} rendering of {PCPs} using joint density distributions for each pair of consecutive variables, resulting in a smooth, continuous visualization. Also, fast brushing techniques are proposed for interactive data selection in multiple linked views, including a {3D} spatial volume view. These techniques have been successfully applied to three large data sets: Hurricane Isabel (Vis'04 contest), the ionization front instability data set (Vis'08 design contest), and data from a large-eddy simulation of cumulus clouds. With these data, we show how {PCPs} can be extended to successfully visualize and interactively explore multi-timepoint volumetric datasets with an order of magnitude more data points.},
    number = {6},
    journal = {{IEEE} Transactions on Visualization and Computer Graphics},
    author = {Blaas, J. and Botha, C. P. and Post, F. H.},
    month = dec,
    year = {2008},
    note = {00031},
    pages = {1436–1451},
    file = {Blaas, Botha, Post - 2008 - Extensions of Parallel Coordinates for Interactive Exploration of Large Multi-Timepoint Data Sets.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/8WA2JWTH/Blaas, Botha, Post - 2008 - Extensions of Parallel Coordinates for Interactive Exploration of Large Multi-Timepoint Data Sets.pdf:application/pdf}
    }

2007

  • [PDF] S. D. Olabarriaga, J. G. Snel, C. P. Botha, and R. G. Belleman, “Integrated support for medical image analysis methods: from development to clinical application,” IEEE transactions on information technology in biomedicine, vol. 11, iss. 1, p. 47–57, 2007.
    [Bibtex]
    @article{olabarriaga_integrated_2007,
    title = {Integrated Support for Medical Image Analysis Methods: from Development to Clinical Application},
    volume = {11},
    lccn = {0018},
    doi = {10.1109/TITB.2006.874929},
    abstract = {Computer-aided image analysis is becoming increasingly important to efficiently and safely handle large amounts of high-resolution images generated by advanced medical imaging devices. The development of medical image analysis ({MIA)} software with the required properties for clinical application, however, is difficult and labor-intensive. Such development should be supported by systems providing scalable computational capacity and storage space, as well as information management facilities. This paper describes the properties of distributed systems to support and facilitate the development, evaluation, and clinical application of {MIA} methods. First, the main characteristics of existing systems are presented. Then, the phases in a method's lifecycle are analyzed (development, parameter optimization, evaluation, clinical routine), identifying the types of users, tasks, and related computational issues. A scenario is described where all tasks are performed with the aid of computational tools integrated into an ideal supporting environment. The requirements for this environment are described, proposing a grid-oriented paradigm that emphasizes virtual collaboration among users, pieces of software, and devices distributed among geographically dispersed healthcare, research, and development enterprises. Finally, the characteristics of the existing systems are analyzed according to these requirements. The proposed requirements offer a useful framework to evaluate, compare, and improve the existing systems that support {MIA} development},
    number = {1},
    journal = {{IEEE} Transactions on Information Technology in Biomedicine},
    author = {Olabarriaga, Sílvia D. and Snel, Jeroen G. and Botha, Charl P. and Belleman, Robert G.},
    month = jan,
    year = {2007},
    note = {00022},
    pages = {47–57},
    file = {Olabarriaga et al. - 2007 - Integrated Support for Medical Image Analysis Methods from Development to Clinical Application.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/D2QFSQQ2/Olabarriaga et al. - 2007 - Integrated Support for Medical Image Analysis Methods from Development to Clinical Application.pdf:application/pdf}
    }

2006

  • {A. B. }. de Haan, B. Willekens, J. Klooster, {A. A. }. Los, J. van Zwieten, {C. P. }. Botha, H. Spekreijse, {S. G. }. {IJskes}, and {H. J. }. Simonsz, “The prenatal development of the human orbit,” Strabismus, vol. 14, iss. 1, pp. 51-56, 2006.
    [Bibtex]
    @article{haan_prenatal_2006,
    title = {The prenatal development of the human orbit},
    volume = {14},
    lccn = {0001},
    number = {1},
    journal = {Strabismus},
    author = {Haan, {A.B.} de and Willekens, B. and Klooster, J. and Los, {A.A.} and Zwieten, J. van and Botha, {C.P.} and Spekreijse, H. and {IJskes}, {S.G.} and Simonsz, {H.J.}},
    month = mar,
    year = {2006},
    note = {00006},
    pages = {51--56}
    }
  • [PDF] L. Zhao, {C. P. }. Botha, {J. O. }. Bescos, R. Truyen, {F. M. }. Vos, and {F. H. }. Post, “Lines of curvature for polyp detection in virtual colonoscopy,” IEEE transactions on visualization and computer graphics, vol. 12, iss. 5, pp. 885-892, 2006.
    [Bibtex]
    @article{zhao_lines_2006,
    title = {Lines of Curvature for Polyp Detection in Virtual Colonoscopy},
    volume = {12},
    issn = {1077-2626},
    lccn = {0020},
    doi = {10.1109/TVCG.2006.158},
    abstract = {Computer-aided diagnosis ({CAD)} is a helpful addition to laborious visual inspection for preselection of suspected colonic polyps in virtual colonoscopy. Most of the previous work on automatic polyp detection makes use of indicators based on the scalar curvature of the colon wall and can result in many false-positive detections. Our work tries to reduce the number of false-positive detections in the preselection of polyp candidates. Polyp surface shape can be characterized and visualized using lines of curvature. In this paper, we describe techniques for generating and rendering lines of curvature on surfaces and we show that these lines can be used as part of a polyp detection approach. We have adapted existing approaches on explicit triangular surface meshes, and developed a new algorithm on implicit surfaces embedded in {3D} volume data. The visualization of shaded colonic surfaces can be enhanced by rendering the derived lines of curvature on these surfaces. Features strongly correlated with true-positive detections were calculated on lines of curvature and used for the polyp candidate selection. We studied the performance of these features on 5 data sets that included 331 pre-detected candidates, of which 50 sites were true polyps. The winding angle had a significant discriminating power for true-positive detections, which was demonstrated by a Wilcoxon rank sum test with p lt;0.001. The median winding angle and inter-quartile range ({IQR)} for true polyps were 7.817 and 6.770-9.288 compared to 2.954 and 1.995-3.749 for false-positive detections},
    number = {5},
    journal = {{IEEE} Transactions on Visualization and Computer Graphics},
    author = {Zhao, L. and Botha, {C.P.} and Bescos, {J.O.} and Truyen, R. and Vos, {F.M.} and Post, {F.H.}},
    month = oct,
    year = {2006},
    note = {00026},
    pages = {885 --892},
    file = {IEEE Xplore Abstract Record:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/XVZ67RDS/stamp.html:text/html;IEEE Xplore Full Text PDF:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/SGJS7T8Z/Zhao et al. - 2006 - Lines of Curvature for Polyp Detection in Virtual .pdf:application/pdf}
    }
  • P. Kok, {B. P. F. }. Lelieveldt, {C. P. }. Botha, F. Post, E. Kaijzel, I. Que, {C. W. G. M. }. Lowik, J.H.C.Reiber, and J. Dijkstra, “INTEGRIM: an image fusion tool for visualization and interpretation of micro-CT and multi-view BLI imaging,” Molecular imaging (SMI 2006 special issue), 2006.
    [Bibtex]
    @article{kok_integrim:_2006,
    title = {{INTEGRIM:} an image fusion tool for visualization and interpretation of micro-{CT} and multi-view {BLI} imaging},
    lccn = {0000},
    journal = {Molecular Imaging ({SMI} 2006 special issue)},
    author = {Kok, P. and Lelieveldt, {B.P.F.} and Botha, {C.P.} and Post, F. and Kaijzel, E. and Que, I. and Lowik, {C.W.G.M.} and {J.H.C.Reiber} and Dijkstra, J.},
    year = {2006},
    note = {00000 Abstract; oral presentation.}
    }

2005

  • [PDF] C. P. Botha and F. H. Post, “Improved perspective visibility ordering for object-order volume rendering,” The visual computer, vol. 21, iss. 11, p. 887–896, 2005.
    [Bibtex]
    @article{botha_improved_2005,
    title = {Improved Perspective Visibility Ordering for Object-Order Volume Rendering},
    volume = {21},
    issn = {0178-2789},
    lccn = {0000},
    number = {11},
    journal = {The Visual Computer},
    author = {Botha, Charl P. and Post, Frits H.},
    month = oct,
    year = {2005},
    note = {00000},
    pages = {887–896},
    file = {botha2005b.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/MV55HBFV/botha2005b.pdf:application/pdf}
    }

2002

  • [PDF] E. R. Valstar, C. P. Botha, M. van der Glas, P. M. Rozing, F. {C. T. }. van der Helm, F. H. Post, and A. M. Vossepoel, “Towards computer-assisted surgery in shoulder joint replacement,” ISPRS journal of photogrammetry and remote sensing, vol. 56, iss. 5–6, p. 326–337, 2002.
    [Bibtex]
    @article{valstar_towards_2002,
    title = {Towards computer-assisted surgery in shoulder joint replacement},
    volume = {56},
    issn = {{ISSN} 0924-2716},
    lccn = {0009},
    number = {5–6},
    journal = {{ISPRS} Journal of Photogrammetry and Remote Sensing},
    author = {Valstar, Edward R. and Botha, Charl P. and Glas, Marjolein van der and Rozing, Piet M. and Helm, Frans {C.T.} van der and Post, Frits H. and Vossepoel, Albert M.},
    month = aug,
    year = {2002},
    note = {00009},
    pages = {326–337},
    file = {valstar2002.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/FJUI5W2U/valstar2002.pdf:application/pdf}
    }

Conference proceedings and everything else

2012

  • [PDF] [URL] N. N. Smit, A. C. Kraima, {. {DERUITER}, D. {JANSMA}, and {. {BOTHA}, “The unified anatomical human (beta): model-based representation of heterogeneous anatomical data,” in Workshop 3D physiological human (3DPH), CASA, 2012.
    [Bibtex]
    @inproceedings{smit_unified_2012,
    title = {The unified anatomical human (beta): Model-based representation of heterogeneous anatomical data},
    lccn = {0002},
    shorttitle = {The unified anatomical human (beta)},
    url = {http://graphics.tudelft.nl/publications/smit_UAH_2012.pdf},
    urldate = {2013-02-01},
    booktitle = {Workshop {3D} Physiological Human ({3DPH)}, {CASA}},
    author = {Smit, N. N. and Kraima, A. C. and {DERUITER}, {MC} and {JANSMA}, D. and {BOTHA}, {CP}},
    year = {2012},
    note = {00002},
    file = {smit_UAH_2012.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/SQM4W7U3/smit_UAH_2012.pdf:application/pdf}
    }
  • [PDF] [URL] A. Khmelinskii, E. Plenge, P. Kok, O. Dzyubachyk, D. H. J. Poot, E. Suidgeest, C. P. Botha, W. J. Niessen, L. van der Weerd, and E. Meijering, “Super-resolution reconstruction of whole-body MRI mouse data: an interactive approach,” in Biomedical imaging (ISBI), 2012 9th IEEE international symposium on, 2012, p. 1723–1726.
    [Bibtex]
    @inproceedings{khmelinskii_super-resolution_2012,
    title = {Super-resolution reconstruction of whole-body {MRI} mouse data: An interactive approach},
    lccn = {0000},
    shorttitle = {Super-resolution reconstruction of whole-body {MRI} mouse data},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6235912},
    urldate = {2013-02-01},
    booktitle = {Biomedical Imaging ({ISBI)}, 2012 9th {IEEE} International Symposium on},
    author = {Khmelinskii, A. and Plenge, E. and Kok, P. and Dzyubachyk, O. and Poot, D. H. J. and Suidgeest, E. and Botha, C. P. and Niessen, W. J. and van der Weerd, L. and Meijering, E.},
    year = {2012},
    note = {00001},
    pages = {1723–1726},
    file = {Khmelinskii et al. - 2012 - Super-resolution reconstruction of whole-body MRI .pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/6INNHRK4/Khmelinskii et al. - 2012 - Super-resolution reconstruction of whole-body MRI .pdf:application/pdf}
    }
  • [PDF] [URL] C. C. van Egmond, C. P. Botha, and B. C. Wünsche, “Design and evaluation of multifield visualisation techniques for 2D vector fields,” in Proceedings of the 27th conference on image and vision computing new zealand, New York, {NY}, {USA}, 2012, p. 115–120.
    [Bibtex]
    @inproceedings{van_egmond_design_2012,
    address = {New York, {NY}, {USA}},
    series = {{IVCNZ} '12},
    title = {Design and evaluation of multifield visualisation techniques for {2D} vector fields},
    isbn = {978-1-4503-1473-2},
    lccn = {0000},
    url = {http://doi.acm.org/10.1145/2425836.2425862},
    doi = {10.1145/2425836.2425862},
    abstract = {The visualisation of vector fields is essential for many applications in science, engineering and biomedicine. A large number of vector icons has been developed, but little research has been done on their effectiveness, especially when visualising multiple vector fields simultaneously. We apply research in visualisation and cognitive science to identify four classes of post-processing techniques for visualising two {2D} vector fields simultaneously: blending, overlay, bump mapping, and masking. We apply these four post-processing methods to Line Integral Convolution ({LIC)} textures and thus develop several novel multi-field visualisation techniques. We evaluate their effectiveness with a user study requiring participants to locate and classify singularities, and to rate each method on its effectiveness and aesthetic value. The results of the study suggest that blending is the most effective technique to combine multiple vector field visualisation textures, while masking performs worst. There is some evidence that visualisations with smooth colour changes are perceived as visually more attractive, and that aesthetics increases the perceived effectiveness of a visualisation technique.},
    urldate = {2013-02-01},
    booktitle = {Proceedings of the 27th Conference on Image and Vision Computing New Zealand},
    publisher = {{ACM}},
    author = {van Egmond, Chris C. and Botha, Charl P. and Wünsche, Burkhard C.},
    year = {2012},
    note = {00000},
    pages = {115–120},
    file = {IVCNZ2012_EgmondEtAl.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/TNKGS32F/IVCNZ2012_EgmondEtAl.pdf:application/pdf}
    }
  • [PDF] [URL] N. N. Smit, A. C. Kraima, D. Jansma, M. C. de Ruiter, and C. P. Botha, “A unified representation for the model-based visualization of heterogeneous anatomy data,” in EuroVis short papers, 2012, pp. 85-89.
    [Bibtex]
    @inproceedings{smit_unified_2012-1,
    title = {A Unified Representation for the Model-based Visualization of Heterogeneous Anatomy Data},
    lccn = {0001},
    url = {http://diglib.eg.org/EG/DL/PE/EuroVisShort/EuroVisShort2012/085-089.pdf},
    doi = {10.2312/PE/EuroVisShort/EuroVisShort2012/085-089},
    abstract = {In the course of anatomical research, anatomists acquire and attempt to organize a great deal of heterogeneous data from different sources, such as {MRI} and {CT} data, cryosections, immunohistochemistry, manual and automatic segmentations of various structures, related literature, the relations between all of these items, and so forth. Currently, there is no way of storing, accessing and visualizing these heterogeneous datasets in an integrated fashion. Such capabilities would have great potential to empower anatomy research. In this work, we present methods for the integration of heterogeneous spatial and non-spatial data from different sources, as well as the complex relations between them, into a single model with standardized anatomical coordinates. All captured data can then be interactively visualized in various ways, depending on the anatomical question. Furthermore, our model enables data to be queried both structurally, i.e., relative to existing anatomical structures, and spatially, i.e., with anatomical coordinates. When new patient-specific medical scans are added to the model, all available model information can be mapped to them. Using this mapping, model information can be transferred back to the new scans, thus enabling the creation of visualizations enriched with information not available in the scans themselves.},
    booktitle = {{EuroVis} Short Papers},
    author = {Smit, N. N. and Kraima, A. C. and Jansma, D. and Ruiter, M. C. de and Botha, C. P.},
    year = {2012},
    note = {00001},
    pages = {85--89},
    file = {smit_unified_2012.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/RG9CAHIE/smit_unified_2012.pdf:application/pdf}
    }
  • [PDF] A. F. van Dixhoorn, J. Milles, B. van Lew, and C. P. Botha, “BrainCove: a tool for voxel-wise fMRI brain connectivity visualization,” in Proc. eurographics workshop on visual computing for biology and medicine, 2012, pp. 99-106.
    [Bibtex]
    @inproceedings{van_dixhoorn_braincove:_2012,
    title = {{BrainCove:} A Tool for Voxel-Wise {fMRI} Brain Connectivity Visualization},
    lccn = {0000},
    booktitle = {Proc. Eurographics Workshop on Visual Computing for Biology and Medicine},
    author = {van Dixhoorn, André F. and Milles, Julien and van Lew, Baldur and Botha, Charl P.},
    year = {2012},
    note = {00000},
    keywords = {functional},
    pages = {99--106},
    file = {van Dixhoorn et al. - 2012 - BrainCove A Tool for Voxel-Wise fMRI Brain Connec.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/9QEFIWT4/van Dixhoorn et al. - 2012 - BrainCove A Tool for Voxel-Wise fMRI Brain Connec.pdf:application/pdf}
    }

2011

  • [PDF] [URL] {B. P. F. }. Lelieveldt, {C. P. }. Botha, {E. L. }. Kaijzel, {E. A. }. Hendriks, {J. H. C. }. Reiber, {C. W. G. M. }. Lowik, and J. Dijkstra, “Towards integrated analysis of longitudinal whole-body small animal imaging studies,” in IEEE ICASSP, 2011, pp. 5768-5771.
    [Bibtex]
    @inproceedings{lelieveldt_towards_2011,
    title = {Towards integrated analysis of longitudinal whole-body small animal imaging studies},
    isbn = {978-1-4577-0538-0},
    lccn = {0000},
    url = {http://ieeexplore.ieee.org/Xplore/login.jsp?url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F5916934%2F5946226%2F05947671.pdf%3Farnumber%3D5947671&authDecision=-203},
    doi = {10.1109/ICASSP.2011.5947671},
    urldate = {2011-09-24},
    booktitle = {{IEEE} {ICASSP}},
    publisher = {{IEEE}},
    author = {Lelieveldt, {B.P.F.} and Botha, {C.P.} and Kaijzel, {E.L.} and Hendriks, {E.A.} and Reiber, {J.H.C.} and Lowik, {C.W.G.M.} and Dijkstra, J.},
    month = may,
    year = {2011},
    note = {00002},
    pages = {5768--5771},
    file = {IEEE Xplore - Sign In:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/UX84S4JC/login.html:text/html;Lelieveldt et al. - 2011 - Towards integrated analysis of longitudinal whole-.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/B9DMT2H6/Lelieveldt et al. - 2011 - Towards integrated analysis of longitudinal whole-.pdf:application/pdf}
    }

2010

  • [PDF] K. Sihan, C. Botha, F. Post, S. de Winter, E. Regar, P. {J. W. C}. Serruys, R. Hamers, and N. Bruining, “Fully automated gating of optical coherence tomography data,” in Computing in cardiology, 2010, 2010, pp. 9-12.
    [Bibtex]
    @inproceedings{sihan_fully_2010,
    title = {Fully automated gating of optical coherence tomography data},
    isbn = {978-1-4244-7318-2},
    lccn = {0000},
    abstract = {Intra-coronary optical coherence tomography ({OCT)} provides ultra-high resolution imaging of coronary vessel wall structures. However, during image acquisition the {OCT} catheter is affected by cardiac motion. These motion-induced artifacts not only complicate longitudinal image reconstructions, it results in a saw-tooth shaped appearance of the coronary vessel wall, but more importantly it affects the accuracy of quantitative analysis ({QOCT).} To overcome this problem we propose to perform image-based gating applying a genetic algorithm ({GA)} that automatically selects a subset of {OCT} cross-sections that are relatively unaffected by the catheter displacement during the cardiac cycle. The gated subset contains cross-sections (frames) acquired in the near end-diastolic phase, during which the heart is relatively motionless. We evaluated the {GA} in a comparison test with a different gating method (Simulated Annealing ({SA))} and with manual frame selection ({MFS)} and found promising results.},
    language = {English},
    booktitle = {Computing in Cardiology, 2010},
    publisher = {{IEEE}},
    author = {Sihan, K. and Botha, C. and Post, F. and de Winter, S. and Regar, E. and Serruys, P. {J.W.C} and Hamers, R. and Bruining, N.},
    month = sep,
    year = {2010},
    note = {00000},
    pages = {9--12},
    file = {Sihan et al. - 2010 - Fully automated gating of optical coherence tomogr.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/6FTZFURG/Sihan et al. - 2010 - Fully automated gating of optical coherence tomogr.pdf:application/pdf}
    }
  • [PDF] [URL] M. D. Steenwijk, J. Milles, M. A. Buchem, J. {H. C. }. Reiber, and C. P. Botha, “Integrated visual analysis for heterogeneous datasets in cohort studies,” in IEEE VisWeek workshop on visual analytics in health care, 2010.
    [Bibtex]
    @inproceedings{steenwijk_integrated_2010,
    title = {Integrated Visual Analysis for Heterogeneous Datasets in Cohort Studies},
    lccn = {0001},
    url = {http://research.ihost.com/vahc2010/},
    booktitle = {{IEEE} {VisWeek} Workshop on Visual Analytics in Health Care},
    author = {Steenwijk, Martijn D. and Milles, Julien and Buchem, Mark A. and Reiber, Johan {H.C.} and Botha, Charl P.},
    year = {2010},
    note = {00003},
    file = {Steenwijk2010.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/VR9FBTX2/Steenwijk2010.pdf:application/pdf}
    }
  • [PDF] D. F. Malan, C. P. Botha, R. {G. H. H. }. Nelissen, and E. R. Valstar, “Voxel classification of perprosthetic tissues in clinical computer tomography of loosened hip prostheses,” in Proc. ISBI, 2010, p. 1341–1344.
    [Bibtex]
    @inproceedings{malan_voxel_2010,
    title = {Voxel classification of perprosthetic tissues in clinical computer tomography of loosened hip prostheses},
    lccn = {0000},
    booktitle = {Proc. {ISBI}},
    author = {Malan, Daniel F. and Botha, Charl P. and Nelissen, Rob {G.H.H.} and Valstar, Edward R.},
    year = {2010},
    note = {00000},
    pages = {1341–1344},
    file = {Malan et al. - 2010 - Voxel classification of perprosthetic tissues in clinical computer tomography of loosened hip prostheses.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/C6MP3SA9/Malan et al. - 2010 - Voxel classification of perprosthetic tissues in clinical computer tomography of loosened hip prostheses.pdf:application/pdf}
    }
  • [PDF] P. J. Schaafsma, S. Schutte, H. J. Simonsz, F. H. Post, and C. P. Botha, “Dynamic visualisation of orbital fat deformation using anatomy-guided interaction,” in Eurographics workshop on visual computing for biology and medicine, 2010, p. 1–8.
    [Bibtex]
    @inproceedings{schaafsma_dynamic_2010,
    title = {Dynamic Visualisation of Orbital Fat Deformation using Anatomy-Guided Interaction},
    lccn = {0000},
    doi = {10.2312/VCBM/VCBM10/001-008},
    booktitle = {Eurographics Workshop on Visual Computing for Biology and Medicine},
    publisher = {Eurographics Association},
    author = {Schaafsma, Pieter J. and Schutte, Sander and Simonsz, Huib J. and Post, Frits H. and Botha, Charl P.},
    editor = {Bartz, Dirk and Botha, Charl P. and Hornegger, Joachim and Machiraju, Raghu and Wiebel, Alexander and Preim, Bernhard},
    year = {2010},
    note = {00000},
    pages = {1–8},
    file = {Schaafsma et al. - 2010 - Dynamic Visualisation of Orbital Fat Deformation using Anatomy-Guided Interaction.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/UFJCBWH3/Schaafsma et al. - 2010 - Dynamic Visualisation of Orbital Fat Deformation using Anatomy-Guided Interaction.pdf:application/pdf}
    }
  • [PDF] [URL] C. P. Botha, P. R. Krekel, E. R. Valstar, P. W. De Bruin, P. M. Rozing, and F. H. Post, “Pre-operative planning and intra-operative guidance for shoulder replacement surgery,” in Scientific visualization: advanced concepts (volume 1 of dagstuhl followups), 2010, p. 179–195.
    [Bibtex]
    @inproceedings{botha_pre-operative_2010,
    title = {Pre-operative planning and intra-operative guidance for shoulder replacement surgery},
    isbn = {978-3-939897-19-4},
    lccn = {0000},
    url = {http://drops.dagstuhl.de/opus/volltexte/2010/2704/},
    booktitle = {Scientific Visualization: Advanced Concepts (Volume 1 of Dagstuhl Followups)},
    publisher = {Schloss {Dagstuhl–Leibniz-Zentrum} fuer Informatik},
    author = {Botha, Charl P. and Krekel, Peter R. and Valstar, Edward R. and De Bruin, Paul W. and Rozing, Piet M. and Post, Frits H.},
    editor = {Hagen, Hans},
    year = {2010},
    note = {00000},
    pages = {179–195},
    file = {Botha2010.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/BI65HBEB/Botha2010.pdf:application/pdf}
    }
  • “Proceedings of the second eurographics workshop on visual computing for biology and medicine,” , Leipzig, 2010, p. 140.
    [Bibtex]
    @inproceedings{bartz_proceedings_2010,
    address = {Leipzig},
    title = {Proceedings of the second Eurographics workshop on Visual Computing for Biology and Medicine},
    isbn = {978-3-905674-28-6},
    lccn = {0000},
    publisher = {Eurographics},
    editor = {Bartz, Dirk and Botha, Charl P. and Hornegger, Joachim and Machiraju, Raghu and Preim, Bernhard},
    year = {2010},
    note = {00000},
    pages = {140}
    }
  • [PDF] A. Van Dixhoorn, B. Vissers, L. Ferrarini, J. Milles, and C. P. Botha, “Visual analysis of integrated resting state functional brain connectivity and anatomy,” in Eurographics workshop on visual computing for biology and medicine, 2010, p. 57–64.
    [Bibtex]
    @inproceedings{van_dixhoorn_visual_2010,
    title = {Visual analysis of integrated resting state functional brain connectivity and anatomy},
    lccn = {0000},
    booktitle = {Eurographics Workshop on Visual Computing for Biology and Medicine},
    publisher = {Eurographics Association},
    author = {Van Dixhoorn, André and Vissers, Bastijn and Ferrarini, Luca and Milles, Julien and Botha, Charl P.},
    editor = {Bartz, Dirk and Botha, Charl P. and Hornegger, Joachim and Machiraju, Raghu and Wiebel, Alexander and Preim, Bernhard},
    year = {2010},
    note = {00000},
    keywords = {{fMRI}, functional},
    pages = {57–64},
    file = {Dixhoorn2010.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/GPES68B2/Dixhoorn2010.pdf:application/pdf}
    }

2009

  • {A. G. }. Dunning, {A. M. }. van Ditten, K. de Vries, S. Ladde, S. Schutte, {C. P. }. Botha, P. Wielopolski, and {H. J. }. Simonsz, “High-resolution MRI of horizontal gaze position for improved optical flow analysis,” in Proc. ARVO, 2009.
    [Bibtex]
    @inproceedings{dunning_high-resolution_2009,
    title = {High-Resolution {MRI} of Horizontal Gaze Position for Improved Optical Flow Analysis},
    lccn = {0000},
    abstract = {Purpose: Long term goal of the Delft Finite Element Model of Orbital Mechanics is to adapt the model for each individual patient using optical flow analysis ({OFA)} of {MRI} scans taken preoperatively. {OFA} can estimate displacements and deformations of the orbital fat by comparing two {MRI} datasets in different positions of gaze. However, this {MRI} data is marred by involuntary head movements and involuntary eye movements. We obtained high resolution data by limiting head and eye movements. Methods: A bite board of {PVC} with dental thermoplast was attached to a stiff {MDF} frame that was mounted rigidly to the {MRI} gantry. To track head movements, {MRI} markers were used to detect inadvertent head movement. A {LED} was rotated at equidistance in front of the dominant eye in 15 directions of gaze, from 35 degrees left gaze to 35 degrees right gaze with steps of 5 degrees. The other eye was covered. Pick-up coils were attached to the frame. Results: Two 23-year-old males were placed supine in the {MRI} scanner with a dental-impression bite board. For 2 minutes {3D} T1 weighted scans were made with a Sigma Excite {3.0T} {MRI} scanner. The successive datasets were analyzed to determine any head movement. With registration of the markers displacements between successive datasets were found to be less than 0.1 mm in transversal, 0.5 mm in temporal and 0.3 mm in vertical direction. The subjects were able to focus on the {LED} and were able to keep their eye fixated in the applied direction of gaze: resolution of the scans in extreme left and right gaze was equal to that of the scan made in primary gaze. Conclusions: Using this approach high resolution {MRI} data sets were obtained and the data sets had sufficient resolution to make high resolution {OFA} of the deformation of orbital fat possible (see accompanying abstract by de Vries et al.).},
    booktitle = {Proc. {ARVO}},
    author = {Dunning, {A.G.} and van Ditten, {A.M.} and de Vries, K. and Ladde, S. and Schutte, S. and Botha, {C.P.} and Wielopolski, P. and Simonsz, {H.J.}},
    year = {2009},
    note = {00000}
    }
  • K. de Vries, {A. M. }. van Ditten, {A. G. }. Dunning, S. Ladde, S. Schutte, {C. P. }. Botha, P. Wielopolski, and {H. J. }. Simonsz, “Validation of the delft finite element model of orbital mechanics,” in Proc. ARVO, 2009.
    [Bibtex]
    @inproceedings{de_vries_validation_2009,
    title = {Validation of the Delft Finite Element Model of Orbital Mechanics},
    lccn = {0000},
    abstract = {Purpose: In the Delft Finite Element Model of Orbital Mechanics, material properties are assigned to the elements based on in-vivo and post mortem measurements. We performed a validation study using high resolution {MRI} data and the previously measured values for viscoelasticity for a comparison with previous in-vivo measurements of passive rotational stiffness of the eye. Methods: High quality {MRI} data of the deformation of the orbital fat were obtained (see accompanying abstract by Dunning et al.). The orbital fat was segmented (Fig.). To estimate the displacement of the orbital fat, optical flow analysis ({OFA)} with the Demons and B-splines algorithms was employed. A stiffness matrix was build from finite element 8-node bricks. Material properties of the stiffness matrix were assigned according to post mortem viscoelasticity measurements on calf orbital fat (G’=250-500 Pa and G’’=80-170 Pa; Schoemaker et al. 2006). Local deformations of the orbital fat were first multiplied with the stiffness matrix of the fat to calculate the nodal forces. By multiplying these nodal forces with the deformations again, the energy of the eye movement was calculated. Dividing this energy by the angle of rotation resulted in the rotational stiffness. To validate the {OFA}, {MRI} control measurements were done by deformation of a piece of beef. Results: Stiffness in horizontal eye rotation was 30 - 480 {mNmm/deg}, comparable to the stiffness found in in-vivo measurements (120 {mNmm/deg).} In the {OFA} validation, translations were within 6\% of the applied value, rotation within 3\% and strain within 4\%. Conclusions: Rotational stiffness of the eye could be derived from imaging data. This is a step towards the use of preoperative {MRI} and {OFA} to adapt the finite element model to an individual patient.},
    booktitle = {Proc. {ARVO}},
    author = {de Vries, K. and van Ditten, {A.M.} and Dunning, {A.G.} and Ladde, S. and Schutte, S. and Botha, {C.P.} and Wielopolski, P. and Simonsz, {H.J.}},
    year = {2009},
    note = {00000}
    }
  • P. R. Krekel, C. P. Botha, E. R. Valstar, {R. G. H. H. }. Nelissen, and P. M. Rozing, “RANGE OF MOTION SIMULATION FOR DIAGNOSIS OF FEMOROACETABULAR IMPINGEMENT,” in Proc. international society of biomechanics (ISB), 2009.
    [Bibtex]
    @inproceedings{krekel_range_2009,
    title = {{RANGE} {OF} {MOTION} {SIMULATION} {FOR} {DIAGNOSIS} {OF} {FEMOROACETABULAR} {IMPINGEMENT}},
    lccn = {0000},
    booktitle = {Proc. International Society of Biomechanics ({ISB)}},
    author = {Krekel, Peter R. and Botha, Charl P. and Valstar, Edward R. and Nelissen, {R.G.H.H.} and Rozing, Piet M.},
    year = {2009},
    note = {00000}
    }
  • [PDF] {V. F. }. van Ravesteijn, L. Zhao, {C. P. }. Botha, {F. H. }. Post, {F. M. }. Vos, and {L. J. }. van Vliet, “Combining mesh volume and streamline representations for polyp detection in CT colonography,” in Proc. ISBI, 2009, p. 907–910.
    [Bibtex]
    @inproceedings{ravesteijn_combining_2009,
    title = {Combining mesh volume and streamline representations for polyp detection in {CT} colonography},
    lccn = {0002},
    booktitle = {Proc. {ISBI}},
    author = {Ravesteijn, {V.F.} van and Zhao, L. and Botha, {C.P.} and Post, {F.H.} and Vos, {F.M.} and Vliet, {L.J.} van},
    year = {2009},
    note = {00005},
    pages = {907–910},
    file = {Ravesteijn et al. - 2009 - Combining mesh volume and streamline representatio.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/9P9SR9JT/Ravesteijn et al. - 2009 - Combining mesh volume and streamline representatio.pdf:application/pdf}
    }
  • S. Schutte, F. Van Keulen, {C. P. }. Botha, {F. C. T. }. van Der Helm, and {H. J. }. Simonsz, “Friction in the orbit,” in Proc. ARVO, 2009.
    [Bibtex]
    @inproceedings{schutte_friction_2009,
    title = {Friction in the Orbit},
    lccn = {0000},
    abstract = {Purpose: The human eye is suspended inside the orbit. The interaction between pressure and tensile forces in the soft tissues keeps the eye in place, while a large range of rotational motion is enabled. The eye, the extraocular muscles ({EOMs)}, orbital fat and the optic nerve mechanically interact and exert forces on each other at every location where they touch. The large range of motion of the eye is facilitated by sliding at interfaces between tissues. It is currently unknown what the magnitude of friction is that occurs at these interface layers and how that relates to the energy lost in viscous deformations of the fat and other tissues. Methods: The main sliding areas in the orbit are (1) between the sclera and the orbital fat, (2) between the {EOMs} and the orbital fat and (3) between the {EOMs} and the orbital wall. The total amount of lost energy in eye rotations was measured post mortem in pigs by passively rotating the eye around the visual axis with a pendulum. This energy was lost in tissue viscosity and friction at the interface layers. The Delft Finite Element Model of Orbital Biomechanics, combined with the material properties of the orbital fat (G’=250-500 Pa and G’’=80-170 {Pa;Schoemaker} et al. 2006) and deformations of the tissues found by {MRI} imaging and optical flow analysis, were used to distinguish between energy lost in friction and energy lost in viscosity. Results: The amount of energy that is lost in eye movements due to friction is small({\textless}10\%) compared to the energy lost in viscosity of the tissues. Sliding in the human body is usually facilitated by a synovial-fluid like substance (mainly consisting of glycosaminoglycans and glycoproteins) which is known to cause low friction in joints. Conclusions: Sliding plays an important role in the orbit and friction at the interface layers is low. Finite-element modeling enabled estimation of the amount of energy lost in friction.},
    booktitle = {Proc. {ARVO}},
    author = {Schutte, S. and Van Keulen, F. and Botha, {C.P.} and van Der Helm, {F.C.T.} and Simonsz, {H.J.}},
    year = {2009},
    note = {00000}
    }

2008

  • [PDF] F. V. Paulovich, R. Pinho, C. P. Botha, A. Heijs, and R. Minghim, “PEx-WEB: content-based visualization of web search results,” in Proc. 12 international conference information visualisation (IV08), 2008, p. 208–214.
    [Bibtex]
    @inproceedings{paulovich_pex-web:_2008,
    title = {{PEx-WEB:} Content-based visualization of web search results},
    lccn = {0007},
    doi = {10.1109/IV.2008.94},
    abstract = {The efficacy of search engines has expanded the uses for the information available on the Web. An increasing number of applications make use of the {WWW} as a primary source of information. The usefulness of such applications is, however, impaired by the current styles of display of the Web search results. This paper presents a system that adapts two techniques to map and explore Web results visually in order to find relevant patterns and relationships amongst the resulting documents. The first technique creates a visual map of the search results using a content-based multidimensional projection. The second techniques is capable of identifying, labeling and displaying topics within sub-groups of documents on the map. The system (The Projection explorer for the {WWW}, or {PEx-Web)} implements these techniques and various additional tools as means to make better use of Web search results for exploratory applications.},
    booktitle = {Proc. 12 International Conference Information Visualisation ({IV08)}},
    publisher = {{IEEE} Computer Society},
    author = {Paulovich, Fernando V. and Pinho, Roberto and Botha, Charl P. and Heijs, Anton and Minghim, Rosane},
    year = {2008},
    note = {00013},
    pages = {208–214},
    file = {Paulovich et al. - 2008 - PEx-WEB Content-based visualization of web search results.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/4QSQ7WDJ/Paulovich et al. - 2008 - PEx-WEB Content-based visualization of web search results.pdf:application/pdf}
    }
  • [PDF] [URL] C. P. Botha and F. H. Post, “Hybrid scheduling in the DeVIDE dataflow visualisation environment,” in Proceedings of simulation and visualization, 2008, p. 309–322.
    [Bibtex]
    @inproceedings{botha_hybrid_2008,
    title = {Hybrid Scheduling in the {DeVIDE} Dataflow Visualisation Environment},
    isbn = {3-936150-53-2},
    lccn = {0019},
    url = {http://graphics.tudelft.nl/publications/botha2008.pdf},
    booktitle = {Proceedings of Simulation and Visualization},
    publisher = {{SCS} Publishing House Erlangen},
    author = {Botha, Charl P. and Post, Frits H.},
    editor = {Hauser, Helwig and Strassburger, Steffen and Theisel, Holger},
    month = feb,
    year = {2008},
    note = {00025 Best paper award.},
    pages = {309–322},
    file = {Botha, Post - 2008 - Hybrid Scheduling in the DeVIDE Dataflow Visualisation Environment.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/T9KNBJ9A/Botha, Post - 2008 - Hybrid Scheduling in the DeVIDE Dataflow Visualisation Environment.pdf:application/pdf}
    }
  • [PDF] C. P. Botha, T. de Graaf, S. Schutte, R. Root, P. Wielopolski, F. {C. T. }. van der Helm, H. J. Simonsz, and F. H. Post, “MRI-based visualisation of orbital fat deformation during eye motion,” in Visualization in medicine and life sciences (VMLS), 2008, pp. 221-233.
    [Bibtex]
    @inproceedings{botha_mri-based_2008,
    title = {{MRI-based} visualisation of orbital fat deformation during eye motion},
    isbn = {978-3-540-72630-2},
    lccn = {0000},
    doi = {10.1007/978-3-540-72630-2_13},
    abstract = {Orbital fat, or the fat behind the eye, plays an important role in eye movements. In order to gain a better understanding of orbital fat mobility during eye motion, {MRI} datasets of the eyes of two healthy subjects were acquired respectively in seven and fourteen different directions of gaze. After semi-automatic rigid registration, the Demons deformable registration algorithm was used to derive time-dependent three-dimensional deformation vector fields from these datasets. Visualisation techniques were applied to these datasets in order to investigate fat mobility in specific regions of interest in the first subject. A qualitative analysis of the first subject showed that in two of the three regions of interest, fat moved half as much as the embedded structures. In other words, when the muscles and the optic nerve that are embedded in the fat move, the fat partly moves along with these structures and partly flows around them. In the second subject, a quantitative analysis was performed which showed a relation between the distance behind the sciera and the extent to which fat moves along with the optic nerve.},
    booktitle = {Visualization in Medicine and Life Sciences ({VMLS)}},
    author = {Botha, Charl P. and Graaf, Thijs de and Schutte, Sander and Root, Ronald and Wielopolski, Piotr and Helm, Frans {C.T.} van der and Simonsz, Huibert J. and Post, Frits H.},
    year = {2008},
    note = {00002},
    pages = {221--233},
    file = {Botha et al. - 2008 - MRI-based visualisation of orbital fat deformation.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/HX9SMC9J/Botha et al. - 2008 - MRI-based visualisation of orbital fat deformation.pdf:application/pdf}
    }
  • [PDF] L. Zhao, C. P. Botha, R. Truyen, F. M. Vos, and F. H. Post, “Efficient seeding and defragmentation of curvature streamlines for colonic polyp detection,” in Proceedings of SPIE medical imaging 2008, 2008.
    [Bibtex]
    @inproceedings{zhao_efficient_2008,
    title = {Efficient Seeding and Defragmentation of Curvature Streamlines for Colonic Polyp Detection},
    volume = {6916},
    lccn = {0000},
    booktitle = {Proceedings of {SPIE} Medical Imaging 2008},
    author = {Zhao, Lingxiao and Botha, Charl P. and Truyen, Roel and Vos, Frans M. and Post, Frits H.},
    editor = {Hu, {X.P.} and Clough, {A.V.}},
    year = {2008},
    note = {00001},
    file = {Zhao et al. - 2008 - Efficient Seeding and Defragmentation of Curvature Streamlines for Colonic Polyp Detection.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/GR9TU2RT/Zhao et al. - 2008 - Efficient Seeding and Defragmentation of Curvature Streamlines for Colonic Polyp Detection.pdf:application/pdf}
    }
  • [PDF] L. Zhao, V. F. van Ravesteijn, C. P. Botha, R. Truyen, F. M. Vos, and F. H. Post, “Surface curvature line clustering for polyp detection in CT colonography,” in Proceedings of the first eurographics workshop on visual computing for biomedicine (VCBM), 2008, p. 53–60.
    [Bibtex]
    @inproceedings{zhao_surface_2008,
    title = {Surface Curvature Line Clustering for Polyp Detection in {CT} Colonography},
    lccn = {0000},
    booktitle = {Proceedings of the first Eurographics workshop on Visual Computing for Biomedicine ({VCBM)}},
    author = {Zhao, Lingxiao and Ravesteijn, Vincent F. van and Botha, Charl P. and Truyen, Roel and Vos, Frans M. and Post, Frits H.},
    editor = {Botha, Charl P. and Kindlmann, Gordon and Niessen, Wiro J. and Preim, Bernhard},
    year = {2008},
    note = {00001},
    pages = {53–60},
    file = {Zhao et al. - 2008 - Surface Curvature Line Clustering for Polyp Detection in CT Colonography.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/25RH9DSZ/Zhao et al. - 2008 - Surface Curvature Line Clustering for Polyp Detection in CT Colonography.pdf:application/pdf}
    }
  • [PDF] K. Sihan, C. Botha, F. Post, S. de Winter, E. Regar, R. Hamers, and N. Bruining, “A novel approach to quantitative analysis of intravascular optical coherence tomography imaging,” in Proceedings of computers in cardiology, 2008, p. 1089–1092.
    [Bibtex]
    @inproceedings{sihan_novel_2008,
    title = {A Novel Approach to Quantitative Analysis of Intravascular Optical Coherence Tomography Imaging},
    lccn = {0002},
    abstract = {Quantitative Coronary analysis on intravascular optical coherence tomography ({OCT)} data ({QOCT)} is currently performed by manual contour tracing in cross-sectional images of {OCT} pullback procedures (frame-based method). For a comprehensive three-dimensional ({3D)} assessment of coronary dimensions of a long segment, analyses derived from many cross-sectional areas, were different contours of corresponding structures need to be traced, results in a time-consuming procedure. Furthermore, the {OCT} data is acquired non-gated resulting in a saw-tooth shaped appearance of the coronary vessel wall, making it difficult or even impossible to use longitudinal views (L-views) for contour tracing. In order to get a more efficient analysis procedure and to investigate if image-based retrospective {OCT} gating would be possible, as first step a novel approach has been developed that exploits a fully automatic contour tracing method for coronary lumens in {OCT} images. The {OCT} images are first translated into the {DICOM} imaging standard format and pre-processed needing a minimum interaction of the users, e.g. the user must identify the center of the catheter. After this the images are filtered with a median filter (to get rid of possible displayed grids into the images), followed by a Gaussian (to get rid of noise) and a Wiener filter (also to get rid of noise). To get rid of black holes a maximum and a minimum filter are than applied. After these pre-processing steps contour detection is performed by applying ray-casting. The so detected contours are re-examined by a {3D} quality check algorithm, were first the images with a high probability of correct contours are identified, after which the contours with lower probabilities are checked. In case side-branches or the vessel is out of the image plane (or other image artifacts) is encountered, contour information from adjacent contours with a high probability are interpolated towards these lower probability contours. The contours are than finally transferred to snakes, which can be easily enhanced by expert human observers if necessary. Automated contour detection of lumen contours in {OCT} images is investigated showing promising results. Future work must address if the so derived contour information could be used for image-based retrospective gating for {OCT.}},
    booktitle = {Proceedings of Computers in Cardiology},
    author = {Sihan, K. and Botha, C. and Post, F. and Winter, S de and Regar, E. and Hamers, R. and Bruining, N.},
    year = {2008},
    note = {00007 {http://www.cinc.org/Program/PC7-4.htm}},
    pages = {1089–1092},
    file = {Sihan et al. - 2008 - A Novel Approach to Quantitative Analysis of Intravascular Optical Coherence Tomography Imaging.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/54MQCDI8/Sihan et al. - 2008 - A Novel Approach to Quantitative Analysis of Intravascular Optical Coherence Tomography Imaging.pdf:application/pdf}
    }

2007

  • N. Bruining, S. Groot, C. P. Botha, F. H. Post, and R. Hamers, “An intravascular ultrasound simulator of coronary plaques based on histopathology,” in American college of cardiology annual scientific session (ACC.07), 2007.
    [Bibtex]
    @inproceedings{bruining_intravascular_2007,
    title = {An Intravascular Ultrasound Simulator of Coronary Plaques Based on Histopathology},
    lccn = {0000},
    booktitle = {American College of Cardiology Annual Scientific Session ({ACC.07)}},
    author = {Bruining, Nico and Groot, Steffen and Botha, Charl P. and Post, Frits H. and Hamers, Ronald},
    year = {2007},
    note = {00000}
    }
  • [PDF] J. Blaas, C. P. Botha, and F. H. Post, “Interactive visualization of multi-field medical data using linked physical and feature-space views,” in Proc. eurographics / IEEE-VGTC EuroVis, 2007, p. 123–130.
    [Bibtex]
    @inproceedings{blaas_interactive_2007,
    title = {Interactive visualization of multi-field medical data using linked physical and feature-space views},
    lccn = {0000},
    booktitle = {Proc. Eurographics / {IEEE-VGTC} {EuroVis}},
    author = {Blaas, Jorik and Botha, Charl P. and Post, Frits H.},
    editor = {Museth, Ken and Ynnerman, Anders and Möller, Torsten},
    year = {2007},
    note = {00021},
    pages = {123–130},
    file = {Blaas2007.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/FFBNZ3XD/Blaas2007.pdf:application/pdf}
    }
  • P. R. Krekel, C. P. Botha, F. H. Post, E. R. Valstar, P. de Bruin, and {P. M. }. Rozing, “Range of motion simulation for shoulder arthroplasty,” in 7th annual meeting of the international society for computer assisted orthopaedic surgery, Heidelberg, Germany, 2007, p. 735–738.
    [Bibtex]
    @inproceedings{krekel_range_2007,
    address = {Heidelberg, Germany},
    title = {Range of motion simulation for shoulder arthroplasty},
    lccn = {0000},
    booktitle = {7th Annual Meeting of the International Society for Computer Assisted Orthopaedic Surgery},
    author = {Krekel, Peter R. and Botha, Charl P. and Post, Frits H. and Valstar, Edward R. and Bruin, Paul de and Rozing, {P.M.}},
    editor = {Langlotz, Frank and Davies, Brian L. and Grützner, Paul A.},
    month = jun,
    year = {2007},
    note = {00000 Poster, 4 page abstract in proceedings.},
    pages = {735–738}
    }
  • [PDF] P. Kok, J. Dijkstra, C. P. Botha, F. H. Post, E. Kaijzel, I. Que, C. Lowik, J. Reiber, and B. P. F. Lelieveldt, “Integrated visualization of multi-angle bioluminescence imaging and micro CT,” in Proc. SPIE medical imaging 2007, 2007.
    [Bibtex]
    @inproceedings{kok_integrated_2007,
    title = {Integrated visualization of multi-angle bioluminescence imaging and micro {CT}},
    volume = {6509},
    lccn = {0000},
    booktitle = {Proc. {SPIE} Medical Imaging 2007},
    author = {Kok, P. and Dijkstra, J. and Botha, C. P. and Post, F. H. and Kaijzel, E. and Que, I. and Lowik, C. and Reiber, J. and Lelieveldt, B. P. F.},
    editor = {Cleary, Kevin R. and Miga, Michael I.},
    year = {2007},
    note = {00017},
    file = {Kok et al. - 2007 - Integrated visualization of multi-angle bioluminescence imaging and micro CT.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/NK9A4XER/Kok et al. - 2007 - Integrated visualization of multi-angle bioluminescence imaging and micro CT.pdf:application/pdf}
    }
  • L. Zhao, C. Botha, J. Bescos, R. Truyen, F. Vos, and F. Post, “Curvature lines for colonic polyp characterization,” in ASCI 2007 – proceedings of the 13th annual conference of the advanced school for computing and imaging, 2007.
    [Bibtex]
    @inproceedings{zhao_curvature_2007,
    title = {Curvature Lines for Colonic Polyp Characterization},
    lccn = {0000},
    booktitle = {{ASCI} 2007 - Proceedings of the 13th Annual Conference of the Advanced School for Computing and Imaging},
    author = {Zhao, Lingxiao and Botha, Charl and Bescos, Javier and Truyen, Roel and Vos, Frans and Post, Frits},
    year = {2007},
    note = {00000 Accepted, to appear.}
    }
  • [PDF] K. C. Maheshwari, S. D. Olabarriaga, C. P. Botha, J. G. Snel, J. Alkemade, and A. Belloum, “Problem solving environment for medical image analysis,” in CBMS ’07: proceedings of the IEEE international symposium on computer based medical systems, 2007, p. 165–170.
    [Bibtex]
    @inproceedings{maheshwari_problem_2007,
    title = {Problem Solving Environment for Medical Image Analysis},
    lccn = {0005},
    doi = {10.1109/CBMS.2007.87},
    booktitle = {{CBMS} '07: Proceedings of the {IEEE} International Symposium on Computer Based Medical Systems},
    author = {Maheshwari, Ketan C. and Olabarriaga, Silvia D. and Botha, Charl P. and Snel, Jeroen G. and Alkemade, Johan and Belloum, Adam},
    year = {2007},
    note = {00005},
    pages = {165–170},
    file = {Maheshwari et al. - 2007 - Problem Solving Environment for Medical Image Anal.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/N2SW6CDH/Maheshwari et al. - 2007 - Problem Solving Environment for Medical Image Anal.pdf:application/pdf}
    }
  • [URL] P. R. Krekel, C. P. Botha, P. W. de Bruin, E. R. Valstar, {P. M. }. Rozing, and F. H. Post, “Computer-assisted shoulder replacement,” in 07291 abstracts collection – scientific visualization (dagstuhl seminar proceedings), 2007, p. 2.
    [Bibtex]
    @inproceedings{krekel_computer-assisted_2007,
    title = {Computer-assisted shoulder replacement},
    lccn = {0000},
    url = {http://drops.dagstuhl.de/opus/frontdoor.php?source_opus=1414},
    booktitle = {07291 Abstracts Collection – Scientific Visualization (Dagstuhl Seminar Proceedings)},
    publisher = {Internationales Begegnungs- und Forschungszentrum für Informatik ({IBFI)}, Schloss Dagstuhl, Germany},
    author = {Krekel, Peter R. and Botha, Charl P. and Bruin, Paul W. de and Valstar, Edward R. and Rozing, {P.M.} and Post, Frits H.},
    editor = {Ebert, David S. and Hagen, Hans and Joy, Kenneth I. and Keith, Daniel A.},
    year = {2007},
    note = {00000 Abstract. Oral presentation by {C.P.} Botha.},
    pages = {2}
    }
  • P. R. Krekel, P. W. de Bruin, C. P. Botha, E. R. Valstar, P. M. Rozing, and F. H. Post, “Evaluation of shoulder range of motion prediction: materials and methods,” in ASCI 2007 – proceedings of the 13th annual conference of the advanced school for computing and imaging, 2007.
    [Bibtex]
    @inproceedings{krekel_evaluation_2007,
    title = {Evaluation of Shoulder Range of Motion Prediction: Materials and Methods},
    lccn = {0000},
    booktitle = {{ASCI} 2007 - Proceedings of the 13th Annual Conference of the Advanced School for Computing and Imaging},
    author = {Krekel, Peter R. and Bruin, Paul W. de and Botha, Charl P. and Valstar, Edward R. and Rozing, P. M. and Post, Frits H.},
    year = {2007},
    note = {00000}
    }
  • [PDF] J. Blaas, C. P. Botha, C. Majoie, A. Nederveen, F. M. Vos, and F. H. Post, “Interactive visualization of fused fMRI and DTI for planning brain tumor resections,” in Proc. SPIE medical imaging 2007, 2007.
    [Bibtex]
    @inproceedings{blaas_interactive_2007-1,
    title = {Interactive Visualization of Fused {fMRI} and {DTI} for Planning Brain Tumor Resections},
    volume = {6509},
    lccn = {0005},
    booktitle = {Proc. {SPIE} Medical Imaging 2007},
    author = {Blaas, Jorik and Botha, Charl P. and Majoie, Charles and Nederveen, Aart and Vos, Frans M. and Post, Frits H.},
    editor = {Cleary, Kevin R. and Miga, Michael I.},
    year = {2007},
    note = {00006},
    file = {Blaas et al. - 2007 - Interactive Visualization of Fused fMRI and DTI fo.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/CRUSMMDU/Blaas et al. - 2007 - Interactive Visualization of Fused fMRI and DTI fo.pdf:application/pdf}
    }

2006

  • [PDF] J. E. van Zwieten, C. P. Botha, B. Willekens, S. Schutte, F. H. Post, and H. J. Simonsz, “Digitisation and 3D reconstruction of 30 year old microscopic sections of human embryo, foetus and orbit,” in Image analysis and recognition, proc. 3rd intl. conf. on image analysis and recognition (ICIAR 2006), 2006, p. 636–647.
    [Bibtex]
    @inproceedings{zwieten_digitisation_2006,
    series = {Lecture Notes on Computer Science},
    title = {Digitisation and {3D} reconstruction of 30 year old microscopic sections of human embryo, foetus and orbit},
    volume = {{LNCS} 4142},
    lccn = {0003},
    booktitle = {Image Analysis and Recognition, Proc. 3rd Intl. Conf. on Image Analysis and Recognition ({ICIAR} 2006)},
    publisher = {Springer},
    author = {Zwieten, Joris E. van and Botha, Charl P. and Willekens, Ben and Schutte, Sander and Post, Frits H. and Simonsz, Huib J.},
    editor = {Campilho, A. and Kamel, M.},
    year = {2006},
    note = {00003},
    pages = {636–647},
    file = {Zwieten et al. - 2006 - Digitisation and 3D reconstruction of 30 year old .pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/GVFTA8D8/Zwieten et al. - 2006 - Digitisation and 3D reconstruction of 30 year old .pdf:application/pdf}
    }
  • P. W. de Bruin, C. P. Botha, B. C. Stoel, E. R. Valstar, and P. M. Rozing, “Validation of navigated glenoid component placement: an in-vitro pilot study,” in 19th annual symposium international society for technology in arthroplasty (ISTA), 2006.
    [Bibtex]
    @inproceedings{bruin_validation_2006,
    title = {Validation of navigated glenoid component Placement: an in-vitro pilot study},
    lccn = {0000},
    booktitle = {19th Annual Symposium International Society for Technology in Arthroplasty ({ISTA)}},
    author = {Bruin, Paul W. de and Botha, Charl P. and Stoel, Berend C. and Valstar, Edward R. and Rozing, Piet M.},
    year = {2006},
    note = {00000 Abstract; oral presentation.}
    }
  • P. R. Krekel, C. P. Botha, F. H. Post, E. R. Valstar, and P. M. Rozing, “Pre-operative impingement detection for shoulder arthroplasty,” in Proceedings of the international shoulder group, 2006.
    [Bibtex]
    @inproceedings{krekel_pre-operative_2006,
    title = {Pre-Operative Impingement Detection For Shoulder Arthroplasty},
    lccn = {0008},
    booktitle = {Proceedings of the International Shoulder Group},
    author = {Krekel, Peter R. and Botha, Charl P. and Post, Frits H. and Valstar, Edward R. and Rozing, Piet M.},
    year = {2006},
    note = {00000 Four page article, oral presentation.}
    }
  • [PDF] P. R. Krekel, C. P. Botha, E. R. Valstar, P. W. de Bruin, P. M. Rozing, and F. H. Post, “Interactive simulation and comparative visualisation of the bone-determined range of motion of the human shoulder,” in Proceedings of simulation and visualization, 2006, p. 275–288.
    [Bibtex]
    @inproceedings{krekel_interactive_2006,
    title = {Interactive simulation and comparative visualisation of the bone-determined range of motion of the human shoulder},
    isbn = {3-936150-46.x},
    lccn = {0011},
    booktitle = {Proceedings of Simulation and Visualization},
    publisher = {{SCS} Publishing House Erlangen},
    author = {Krekel, Peter R. and Botha, Charl P. and Valstar, Edward R. and Bruin, Paul W. de and Rozing, Piet M. and Post, Frits H.},
    editor = {Schulze, Thomas and Horton, Graham and Preim, Bernhard and Schlechtweg, Stefan},
    month = mar,
    year = {2006},
    note = {00014 Best Paper Award.},
    pages = {275–288},
    file = {Krekel et al. - 2006 - Interactive simulation and comparative visualisati.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/8AVTQJ2Q/Krekel et al. - 2006 - Interactive simulation and comparative visualisati.pdf:application/pdf}
    }
  • P. R. Krekel, C. P. Botha, E. R. Valstar, P. W. de Bruin, P. M. Rozing, and F. H. Post, “Visualisation of gleno-humeral range of motion for shoulder arthroplasty,” in ASCI 2006 – proceedings of the 11th annual conference of the advanced school for computing and imaging, 2006.
    [Bibtex]
    @inproceedings{krekel_visualisation_2006,
    title = {Visualisation of gleno-humeral range of motion for shoulder arthroplasty},
    lccn = {0007},
    booktitle = {{ASCI} 2006 - Proceedings of the 11th annual conference of the Advanced School for Computing and Imaging},
    author = {Krekel, Peter R. and Botha, Charl P. and Valstar, Edward R. and Bruin, Paul W. de and Rozing, Piet M. and Post, Frits H.},
    month = jun,
    year = {2006},
    note = {00000}
    }
  • J. Blaas, C. P. Botha, B. Peters, F. M. Vos, and F. H. Post, “Interactive exploration of connective brain structure through diffusion tensor imaging,” in ASCI 2006 – proceedings of the 11th annual conference of the advanced school for computing and imaging, 2006.
    [Bibtex]
    @inproceedings{blaas_interactive_2006,
    title = {Interactive Exploration of Connective Brain Structure through Diffusion Tensor Imaging},
    lccn = {0000},
    booktitle = {{ASCI} 2006 - Proceedings of the 11th annual conference of the Advanced School for Computing and Imaging},
    author = {Blaas, Jorik and Botha, Charl P. and Peters, Bart and Vos, Frans M. and Post, Frits H.},
    month = jun,
    year = {2006},
    note = {00000}
    }
  • [PDF] [URL] {S. C. }. Groot, R. Hamers, {F. H. }. Post, {C. P. }. Botha, and N. Bruining, “IVUS simulation based on histopathology,” in Computers in cardiology, 2006, p. 681–684.
    [Bibtex]
    @inproceedings{groot_ivus_2006,
    title = {{IVUS} Simulation Based on Histopathology},
    lccn = {0000},
    url = {http://cinc.mit.edu/archives/2006/},
    booktitle = {Computers in Cardiology},
    author = {Groot, {S.C.} and Hamers, R. and Post, {F.H.} and Botha, {C.P.} and Bruining, N.},
    editor = {Murray, Alan},
    year = {2006},
    note = {00005 {ISSN} 0276-6547},
    pages = {681–684},
    file = {groot2006.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/RG8RHS8D/groot2006.pdf:application/pdf}
    }

2005

  • [PDF] C. P. Botha, T. de Graaf, R. Root, P. Wielopolski, S. Schutte, F. H. Post, F. {C. T. }. van der Helm, and H. Simonsz, “Time-varying three-dimensional vector field visualisation for the analysis of retrobulbar fat mobility during eye motion,” in ASCI 2005 – proceedings of the 11th annual conference of the advanced school for computing and imaging, 2005, p. 271–275.
    [Bibtex]
    @inproceedings{botha_time-varying_2005,
    title = {Time-varying three-dimensional vector field visualisation for the analysis of retrobulbar fat mobility during eye motion},
    isbn = {90-803086-0-9},
    lccn = {0000},
    booktitle = {{ASCI} 2005 - Proceedings of the 11th annual conference of the Advanced School for Computing and Imaging},
    author = {Botha, Charl P. and Graaf, Thijs de and Root, Ronald and Wielopolski, Piotr and Schutte, Sander and Post, Frits H. and Helm, Frans {C.T.} van der and Simonsz, Huib},
    editor = {Kröse, {B.J.A.} and Bos, {H.J.} and Hendriks, {E.A.} and Heijnsdijk, {J.W.J.}},
    month = jun,
    year = {2005},
    note = {00003},
    pages = {271–275},
    file = {botha2005.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/HKXA9U6T/botha2005.pdf:application/pdf}
    }
  • [PDF] J. Blaas, C. P. Botha, B. Peters, F. M. Vos, and F. H. Post, “Fast and reproducible fiber bundle selection in DTI visualization,” in Proceedings of IEEE visualization 2005, 2005, p. 59–64.
    [Bibtex]
    @inproceedings{blaas_fast_2005,
    title = {Fast and reproducible fiber bundle selection in {DTI} visualization},
    lccn = {0031},
    booktitle = {Proceedings of {IEEE} Visualization 2005},
    author = {Blaas, Jorik and Botha, Charl P. and Peters, Bart and Vos, Frans M. and Post, Frits H.},
    editor = {Silva, Claudio and Gröller, Eduard and Rushmeier, Holly},
    month = oct,
    year = {2005},
    note = {00039},
    pages = {59–64},
    file = {blaas2005.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/WQABZIPJ/blaas2005.pdf:application/pdf}
    }
  • J. van Zwieten, C. P. Botha, B. Willekens, S. Schutte, F. H. Post, and H. J. Simonsz, “Digital 3D reconstruction of human orbitae from high resolution serial sections,” in Proceedings of the association for research in vision and ophthalmology (ARVO) annual meeting, 2005.
    [Bibtex]
    @inproceedings{zwieten_digital_2005,
    title = {Digital {3D} Reconstruction of Human Orbitae from High Resolution Serial Sections},
    lccn = {0000},
    booktitle = {Proceedings of the Association for Research in Vision and Ophthalmology ({ARVO)} Annual Meeting},
    author = {Zwieten, J. van and Botha, C. P. and Willekens, B. and Schutte, S. and Post, F. H. and Simonsz, H. J.},
    year = {2005},
    note = {00001}
    }
  • [PDF] C. P. Botha, “Techniques and software architectures for medical visualisation and image processing,” PhD Thesis, 2005.
    [Bibtex]
    @phdthesis{botha_techniques_2005,
    title = {Techniques and Software Architectures for Medical Visualisation and Image Processing},
    lccn = {0006},
    school = {Delft University of Technology},
    author = {Botha, Charl Pieter},
    year = {2005},
    note = {00009},
    file = {Botha - 2005 - Techniques and Software Architectures for Medical .pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/F3A4KFCU/Botha - 2005 - Techniques and Software Architectures for Medical .pdf:application/pdf}
    }
  • R. Root, T. R. de Graaf, C. P. Botha, P. Wielopolski, S. Schutte, F. C. T. van der Helm, and H. J. Simonsz, “Deformation of retrobulbar fat analysis with optical flow technique,” in Proceedings of the association for research in vision and ophthalmology (ARVO) annual meeting, 2005.
    [Bibtex]
    @inproceedings{root_deformation_2005,
    title = {Deformation of retrobulbar fat analysis with optical flow technique},
    lccn = {0002},
    booktitle = {Proceedings of the Association for Research in Vision and Ophthalmology ({ARVO)} Annual Meeting},
    author = {Root, R. and Graaf, T. R. de and Botha, C. P. and Wielopolski, P. and Schutte, S. and Helm, F. C. T. van der and Simonsz, H. J.},
    year = {2005},
    note = {00000}
    }

2004

  • [PDF] B. Vrolijk, C. P. Botha, and F. H. Post, “Fast time-dependent isosurface extraction and rendering,” in Proceedings of the spring conference on computer graphics 2004, 2004, p. 39–48.
    [Bibtex]
    @inproceedings{vrolijk_fast_2004,
    title = {Fast Time-Dependent Isosurface Extraction and Rendering},
    isbn = {80-223-1918-X},
    lccn = {0000},
    booktitle = {Proceedings of the Spring Conference on Computer Graphics 2004},
    publisher = {Comenius University, Bratislava},
    author = {Vrolijk, Benjamin and Botha, Charl P. and Post, Frits H.},
    editor = {Pasko, Alexander},
    month = apr,
    year = {2004},
    note = {00007},
    pages = {39–48},
    file = {vrolijk2004b.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/RGJ62PCM/vrolijk2004b.pdf:application/pdf}
    }
  • [PDF] B. Vrolijk, C. P. Botha, and F. H. Post, “Fast extraction and rendering of isosurfaces from 4D data,” in ASCI 2004 – proceedings of the 10th annual conference of the advanced school for computing and imaging, 2004, p. 281–290.
    [Bibtex]
    @inproceedings{vrolijk_fast_2004-1,
    title = {Fast extraction and rendering of isosurfaces from {4D} data},
    isbn = {90-803086-9-2},
    lccn = {0000},
    booktitle = {{ASCI} 2004 - Proceedings of the 10th annual conference of the Advanced School for Computing and Imaging},
    author = {Vrolijk, Benjamin and Botha, Charl P. and Post, Frits H.},
    editor = {Wijk, J. J. van and Heijnsdijk, J. W. J. and Langendoen, K. G. and Veltkamp, R.},
    month = jun,
    year = {2004},
    note = {00002},
    pages = {281–290},
    file = {vrolijk2004.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/TAKN47XT/vrolijk2004.pdf:application/pdf}
    }

2003

  • [PDF] C. P. Botha and F. H. Post, “ShellSplatting: interactive rendering of anisotropic volumes,” in Data visualization 2003 (proceedings of joint eurographics – IEEE TCVG symposium on visualization), 2003, p. 105–112.
    [Bibtex]
    @inproceedings{botha_shellsplatting:_2003,
    title = {{ShellSplatting:} Interactive Rendering of Anisotropic Volumes},
    lccn = {0013},
    booktitle = {Data Visualization 2003 (Proceedings of Joint Eurographics - {IEEE} {TCVG} Symposium on Visualization)},
    author = {Botha, Charl P. and Post, Frits H.},
    editor = {Bonneau, G.-P. and Hahmann, S. and Hansen, C. D.},
    year = {2003},
    note = {00014},
    pages = {105–112},
    file = {Botha and Post - 2003 - ShellSplatting Interactive Rendering of Anisotrop.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/GCXVPV7F/Botha and Post - 2003 - ShellSplatting Interactive Rendering of Anisotrop.pdf:application/pdf}
    }

2002

  • [PDF] M. van der Glas, F. M. Vos, C. P. Botha, and A. M. Vossepoel, “Determination of position and radius of ball joints,” in Proceedings of the SPIE international symposium on medical imaging, 2002, p. 1571–1577.
    [Bibtex]
    @inproceedings{glas_determination_2002,
    title = {Determination of Position and Radius of Ball Joints},
    volume = {4684 - Image Processing},
    lccn = {0000},
    booktitle = {Proceedings of the {SPIE} International Symposium on Medical Imaging},
    author = {Glas, Marjolein van der and Vos, Frans M. and Botha, Charl P. and Vossepoel, Albert M.},
    editor = {Sonka, Milan},
    year = {2002},
    note = {00000},
    pages = {1571–1577},
    file = {vanderglas2002.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/B8WF9BFI/vanderglas2002.pdf:application/pdf}
    }
  • [PDF] C. P. Botha and F. H. Post, “New technique for transfer function specification in direct volume rendering using real-time visual feedback,” in Proceedings of the SPIE international symposium on medical imaging, 2002.
    [Bibtex]
    @inproceedings{botha_new_2002,
    title = {New technique for transfer function specification in direct volume rendering using real-time visual feedback},
    volume = {4681 - Visualization, Image-Guided Procedures, and Display},
    lccn = {0014},
    booktitle = {Proceedings of the {SPIE} International Symposium on Medical Imaging},
    author = {Botha, Charl P. and Post, Frits H.},
    editor = {Mun, Seong K.},
    year = {2002},
    note = {00016},
    file = {botha2002.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/FU7K8XM4/botha2002.pdf:application/pdf}
    }
  • [PDF] C. P. Botha and F. H. Post, “Interactive previewing for transfer function specification in volume rendering,” in Data visualization 2002 (proceedings of joint eurographics – IEEE TCVG symposium on visualization), 2002.
    [Bibtex]
    @inproceedings{botha_interactive_2002,
    title = {Interactive Previewing for Transfer Function Specification in Volume Rendering},
    lccn = {0005},
    booktitle = {Data Visualization 2002 (Proceedings of Joint Eurographics - {IEEE} {TCVG} Symposium on Visualization)},
    publisher = {{ACM} {SigGraph}},
    author = {Botha, Charl P. and Post, Frits H.},
    editor = {Ebert, D. and Brunet, P. and Navazo, I.},
    year = {2002},
    note = {00005},
    file = {Botha and Post - 2002 - Interactive Previewing for Transfer Function Speci.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/TPIMR39J/Botha and Post - 2002 - Interactive Previewing for Transfer Function Speci.pdf:application/pdf}
    }

2001

  • [PDF] C. P. Botha and F. H. Post, “A visualisation platform for shoulder replacement surgery,” in Interactive medical image visualization and analysis (IMIVA) – satellite workshop of MICCAI 2001, 2001, p. 61–64.
    [Bibtex]
    @inproceedings{botha_visualisation_2001,
    title = {A Visualisation Platform for Shoulder Replacement Surgery},
    lccn = {0006},
    booktitle = {Interactive Medical Image Visualization and Analysis ({IMIVA)} - Satellite Workshop of {MICCAI} 2001},
    author = {Botha, Charl P. and Post, Frits H.},
    editor = {Olabarriaga, Silvia D. and Niessen, Wiro J. and Gerritsen, Frans},
    month = oct,
    year = {2001},
    note = {00006},
    pages = {61–64},
    file = {botha2001.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/X72ZNZRC/botha2001.pdf:application/pdf}
    }

1999

  • [PDF] {C. P. }. Botha, {D. M. }. Weber, M. van Olst, and {D. W. }. Moolman, “A practical system for realtime on-plant flotation froth visual parameter extraction,” in Proceedings of IEEE africon, 1999, p. 103–106.
    [Bibtex]
    @inproceedings{botha_practical_1999,
    title = {A practical system for realtime on-plant flotation froth visual parameter extraction},
    lccn = {0000},
    booktitle = {Proceedings of {IEEE} Africon},
    author = {Botha, {C.P.} and Weber, {D.M.} and Olst, M. van and Moolman, {D.W.}},
    year = {1999},
    note = {00000},
    pages = {103–106},
    file = {Botha et al. - 1999 - A practical system for realtime on-plant flotation froth visual parameter extraction.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/ZPC2H6A5/Botha et al. - 1999 - A practical system for realtime on-plant flotation froth visual parameter extraction.pdf:application/pdf}
    }
  • [PDF] C. P. Botha, “An on-line machine vision flotation froth analysis platform,” PhD Thesis, 1999.
    [Bibtex]
    @phdthesis{botha_-line_1999,
    title = {An On-Line Machine Vision Flotation Froth Analysis Platform},
    school = {University of Stellenbosch},
    author = {Botha, Charl Pieter},
    year = {1999},
    note = {00002 {M.Sc.} thesis},
    file = {Botha - 1999 - An On-Line Machine Vision Flotation Froth Analysis Platform.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/EXMAAEVD/Botha - 1999 - An On-Line Machine Vision Flotation Froth Analysis Platform.pdf:application/pdf}
    }

1998

  • [PDF] C. Coetzee, C. Botha, and D. Weber, “PC based number plate recognition system,” in Proceedings of IEEE international symposium on industrial electronics, 1998, p. 605–610.
    [Bibtex]
    @inproceedings{coetzee_pc_1998,
    title = {{PC} Based Number Plate Recognition System},
    lccn = {0058},
    booktitle = {Proceedings of {IEEE} International Symposium on Industrial Electronics},
    author = {Coetzee, Charl and Botha, Charl and Weber, David},
    year = {1998},
    note = {00068},
    pages = {605–610},
    file = {Coetzee, Botha, Weber - 1999 - PC Based Number Plate Recognition System.pdf:/home/cpbotha/.mozilla/firefox/iadnvapt.default/zotero/storage/IGFSVUFK/Coetzee, Botha, Weber - 1999 - PC Based Number Plate Recognition System.pdf:application/pdf}
    }