Geometric modeling of pelvic organs with thickness

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).
Type de document :
Communication dans un congrès
3-Dimensional Image Processing (3DIP) and Applications II, Jan 2012, Burlingame, CA, United States. 8290, pp.82900I, 2012, Proceedings of SPIE - The International Society for Optical Engineering. 〈10.1117/12.907463〉
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https://hal.archives-ouvertes.fr/hal-01176126
Contributeur : Frédéric Davesne <>
Soumis le : mardi 14 juillet 2015 - 21:17:54
Dernière modification le : mercredi 12 septembre 2018 - 01:27:24

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Thierry Bay, Z.W. Chen,, Romain Raffin,, Marc Daniel, Pierre Joli, et al.. Geometric modeling of pelvic organs with thickness. 3-Dimensional Image Processing (3DIP) and Applications II, Jan 2012, Burlingame, CA, United States. 8290, pp.82900I, 2012, Proceedings of SPIE - The International Society for Optical Engineering. 〈10.1117/12.907463〉. 〈hal-01176126〉

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