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Modèle électromécanique du coeur pour l'analyse d'image et la simulation

Maxime Sermesant 1
1 EPIDAURE - Medical imaging and robotics
CRISAM - Inria Sophia Antipolis - Méditerranée
Abstract : Electromechanical Model of the Heart for Image Analysis and Simulation. This thesis presents a dynamic model of the cardiac electromechanical activity for the analysis of time series of medical images and the simulation of the cardiac function. First, a method to build volumetric biomechanical models based on tetrahedral meshes is presented. Then, the action potential propagation is simulated using FitzHugh-Nagumo reaction-di usion equations, enabling the introduction of pathologies and the simulation of surgical procedures. The myocardium contraction is modeled according to a rheological law which includes an electromechanical coupling and boundary conditions based on blood pressure and volume constraints. Simulation of a cardiac cycle leads to the validation of some global and local cardiac function parameters. A cardiac image segmentation process integrating this electromechanical model is then introduced following the deformable model framework. Preliminary results of this segmentation system indicates that using a priori knowledge about the anatomy, mechanical behavior and motion in a pro-active deformable model improves the robustness and accuracy of the segmentation despite the sparse and noisy nature of medical images.
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https://tel.archives-ouvertes.fr/tel-00003655
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Submitted on : Monday, October 27, 2003 - 12:43:55 PM
Last modification on : Monday, October 19, 2020 - 10:53:41 AM
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Maxime Sermesant. Modèle électromécanique du coeur pour l'analyse d'image et la simulation. Interface homme-machine [cs.HC]. Université Nice Sophia Antipolis, 2003. Français. ⟨tel-00003655⟩

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