A ChainMail Algorithm for Direct Volume Deformation in Virtual Endoscopy Applications

Christoph Dräger
A ChainMail Algorithm for Direct Volume Deformation in Virtual Endoscopy Applications
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Abstract

Endoscopy is an integral part of medical practice although the procedure is often unpleasant for the patient. Virtual endoscopy is a diagnosis tool which visualizes 3D image data sets to show a virtual view of the patient similar to the images generated by a traditional endoscopy. A virtualendoscopysystemcalledSTEPSwasdevelopedattheVRVistosimulatetranssphenoidal endonasal pituitary adenoma surgery. This thesis describes a deformation engine extending the STEPS application to enhance the realism. The two main contributions are the development of the Divod ChainMail algorithm, an algorithm for direct volume deformation based on the Chain- Mail and Enhanced ChainMail algorithms, and the integration of the engine into the existing STEPS. We use a Constrained Particle System to directly model and manipulate the volume data instead of modeling objects extracted from the volume data. We further proposes a simple interface to ease integration and enforce reusability of the software components. This thesis describes our Divod ChainMail algorithm, the interface and integration details, and provides timing results. Finally, it offers a discussion of the presented methods pointing out possible improvements and further work.

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@mastersthesis{draeger-2005-chain,
  title =      "A ChainMail Algorithm for Direct Volume Deformation in
               Virtual Endoscopy Applications",
  author =     "Christoph Dr{\"a}ger",
  year =       "2005",
  abstract =   "Endoscopy is an integral part of medical practice although
               the procedure is often unpleasant for the patient. Virtual
               endoscopy is a diagnosis tool which visualizes 3D image data
               sets to show a virtual view of the patient similar to the
               images generated by a traditional endoscopy. A
               virtualendoscopysystemcalledSTEPSwasdevelopedattheVRVistosimulatetranssphenoidal
               endonasal pituitary adenoma surgery. This thesis describes a
               deformation engine extending the STEPS application to
               enhance the realism. The two main contributions are the
               development of the Divod ChainMail algorithm, an algorithm
               for direct volume deformation based on the Chain- Mail and
               Enhanced ChainMail algorithms, and the integration of the
               engine into the existing STEPS. We use a Constrained
               Particle System to directly model and manipulate the volume
               data instead of modeling objects extracted from the volume
               data. We further proposes a simple interface to ease
               integration and enforce reusability of the software
               components. This thesis describes our Divod ChainMail
               algorithm, the interface and integration details, and
               provides timing results. Finally, it offers a discussion of
               the presented methods pointing out possible improvements and
               further work.",
  address =    "Favoritenstrasse 9-11/186, A-1040 Vienna, Austria",
  school =     "Institute of Computer Graphics and Algorithms, Vienna
               University of Technology",
  URL =        "http://www.cg.tuwien.ac.at/research/publications/2005/draeger-2005-chain/",
}