Information

Abstract

The majority of virtual endoscopy techniques tries to simulate a real endoscopy. A real endoscopy does not always give the optimal information due to the physical limitations it is subject to. In this paper, we deal with the unfolding of the surface of the colon as a possible visualization technique for diagnosis and polyp detection. A new two-step technique is presented which deals with the problems of double appearance of polyps and nonuniform sampling that other colon unfolding techniques suffer from. In the first step, a distance map from a central path induces nonlinear rays for unambiguous parameterization of the surface. The second step compensates for locally varying distortions of the unfolded surface. A technique similar to magnification fields in information visualization is hereby applied. The technique produces a single view of a complete virtually dissected colon.

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BibTeX

@techreport{Vilanova-2001-VCU,
  title =      "Virtual Colon Unfolding",
  author =     "Anna Vilanova i Bartrol\'{i} and Rainer Wegenkittl and
               Andreas K\"{o}nig and Meister Eduard Gr\"{o}ller",
  year =       "2001",
  abstract =   "The majority of virtual endoscopy  techniques tries to
               simulate a real endoscopy. A real endoscopy does not always
               give the optimal information due to the physical limitations
               it is subject to. In this paper, we deal with the unfolding
               of the surface of the colon as a possible visualization
               technique for diagnosis and polyp detection. A new two-step
               technique is presented which deals with the problems of
               double appearance of polyps and nonuniform sampling that
               other colon unfolding techniques suffer from. In the first
               step, a distance map from a central path induces nonlinear
               rays for unambiguous parameterization of the surface. The
               second step compensates for locally varying distortions of
               the unfolded surface. A technique similar to magnification
               fields in information visualization is hereby applied. The
               technique                  produces a single view of a
               complete virtually dissected colon.",
  month =      apr,
  number =     "TR-186-2-01-08",
  address =    "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria",
  institution = "Institute of Computer Graphics and Algorithms, Vienna
               University of Technology ",
  note =       "human contact: technical-report@cg.tuwien.ac.at",
  keywords =   "Virtual Endoscopy, Volume Rendering",
  URL =        "https://www.cg.tuwien.ac.at/research/publications/2001/Vilanova-2001-VCU/",
}