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Modélisation et simulation paramétrable d'objets déformables.
Application aux traitements des cancers pulmonaires.

Abstract : Ionising treatment against cancers such as conformal radiotherapy and hadrontherapy are planified with error margins that take into account statistics of tumour motions, for instance.

With the Centre against cancers Léon Bérard de Lyon partnership and within the ETOILE project, we are looking for reducing these margins by searching deformable models that would simulate displacements occuring in lungs during a treatment. It must be personalized with the geometry obtained from CT scans of the patient and also it must be parameterized with physiological measures of the patient.

In this Ph. D. thesis, we decided to use a mass-spring system to model lungs because of its fast and physically realist deformations obtained in animation.
As a starting point, we chose the model proposed by Van Gelder in order to parameterize a mass-spring system with rheological characteristics of an homogeneous, linear elastic isotrop material in 2D.
However, we tested this model and prouved it was false.
Hence we did a lagrangian study in order to obtain a parametric model with rectangular in 2D (cubic in 3D) elements.
We also determinated the robustness by testing with stretching, inflating, shearing and bending experiments and also by comparing results with other finite element method.

Thus, in this Ph.D. thesis, we eplain how to obtain this parametric model, and how it will be linked to physiological data and in which accuracy.
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https://tel.archives-ouvertes.fr/tel-00279986
Contributor : Vincent Baudet <>
Submitted on : Thursday, May 15, 2008 - 11:03:20 PM
Last modification on : Wednesday, July 8, 2020 - 12:42:08 PM
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  • HAL Id : tel-00279986, version 1

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Vincent Baudet. Modélisation et simulation paramétrable d'objets déformables.
Application aux traitements des cancers pulmonaires.. Modélisation et simulation. Université Claude Bernard - Lyon I, 2006. Français. ⟨tel-00279986⟩

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