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Modélisation géométrique de bifurcations

Alexandre Moreau-Gaudry 1
1 TIMC-GMCAO - Gestes Medico-chirurgicaux Assistés par Ordinateur
TIMC - Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525
Abstract : Because branching is not homotopic to classic surfaces, as a cylinder, a sphere or a torus, natural parameterization is not obvious. This research work in the modeling and imaging field describes first, possible planar one-to-one parameterizations of branching, which allows generating a C1 surface of similar shape. This surface is built as an envelope lying on a deformable skeleton and totally defined by 24 parameters. Then, motivated by a possible improvement of the study of cardiovascular diseases, which are the main cause of death in industrialized countries, the surface is attracted by 2.5D ultrasonic data from the carotid artery branching. In order to obtain these data, a system, using an optical localizer connected to an ultrasonic system, was developed and evaluated. Using various additional a priori knowledge, the surface is then fitted to previously acquired ultrasonic data, according to two different methods ("extraction and adjustment", "active model"). First results obtained with this approach are presented in this work.
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Alexandre Moreau-Gaudry. Modélisation géométrique de bifurcations. Modélisation et simulation. Université Joseph-Fourier - Grenoble I, 2000. Français. ⟨tel-00006751⟩

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