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Proceedings Paper

Geometric modeling of pelvic organs with thickness
Author(s): T. Bay; Z.-W. Chen; R. Raffin; M. Daniel; P. Joli; Z.-Q. Feng; M.-E. Bellemare
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Paper Abstract

Physiological changes in the spatial configuration of the internal organs in the abdomen can induce different disorders that need surgery. Following the complexity of the surgical procedure, mechanical simulations are necessary but the in vivo factor makes complicate the study of pelvic organs. In order to determine a realistic behavior of these organs, an accurate geometric model associated with a physical modeling is therefore required. Our approach is integrated in the partnership between a geometric and physical module. The Geometric Modeling seeks to build a continuous geometric model: from a dataset of 3D points provided by a Segmentation step, surfaces are created through a B-spline fitting process. An energy function is built to measure the bidirectional distance between surface and data. This energy is minimized with an alternate iterative Hoschek-like method. A thickness is added with an offset formulation, and the geometric model is finally exported in a hexahedral mesh. Afterward, the Physical Modeling tries to calculate the properties of the soft tissues to simulate the organs displacements. The physical parameters attached to the data are determined with a feedback loop between finite-elements deformations and ground-truth acquisition (dynamic MRI).

Paper Details

Date Published: 30 January 2012
PDF: 14 pages
Proc. SPIE 8290, Three-Dimensional Image Processing (3DIP) and Applications II, 82900I (30 January 2012); doi: 10.1117/12.907463
Show Author Affiliations
T. Bay, Lab. des Sciences de l'Information et des Systèmes, CNRS, Aix-Marseille Univ. (France)
Z.-W. Chen, Univ. d'Evry-Val d'Essonne (France)
R. Raffin, Lab. des Sciences de l'Information et des Systèmes, CNRS, Aix-Marseille Univ. (France)
M. Daniel, Lab. des Sciences de l'Information et des Systèmes, CNRS, Aix-Marseille Univ. (France)
P. Joli, Univ. d'Evry-Val d'Essonne (France)
Z.-Q. Feng, Univ. d'Evry-Val d'Essonne (France)
M.-E. Bellemare, Lab. des Sciences de l'Information et des Systèmes, CNRS, Aix-Marseille Univ. (France)


Published in SPIE Proceedings Vol. 8290:
Three-Dimensional Image Processing (3DIP) and Applications II
Atilla M. Baskurt; Robert Sitnik, Editor(s)

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