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Atlas-Based Automatic Generation of Subject-Specific Finite Element Tongue Meshes

Article dans une revue avec comité de lecture
Author
BIJAR, Ahmad
388249 Gestes Medico-chirurgicaux Assistés par Ordinateur [TIMC-IMAG-GMCAO]
390501 GIPSA - Perception, Contrôle, Multimodalité et Dynamiques de la parole [GIPSA-PCMD]
PERRIER, Pascal
24470 Grenoble Images Parole Signal Automatique [GIPSA-lab]
388728 GIPSA - Machines parlantes, Gestes oro-faciaux, Interaction Face-à-face, Communication augmentée [GIPSA-MAGIC]
PAYAN, Yohan
707 Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 [TIMC-IMAG]
388249 Gestes Medico-chirurgicaux Assistés par Ordinateur [TIMC-IMAG-GMCAO]
ccROHAN, Pierre-Yves
175453 Arts et Métiers ParisTech
466360 Institut de Biomecanique Humaine Georges Charpak

URI
http://hdl.handle.net/10985/15998
DOI
10.1007/s10439-015-1497-y
Date
2015
Journal
Annals of Biomedical Engineering

Abstract

Generation of subject-specific 3D finite element (FE) models requires the processing of numerous medical images in order to precisely extract geometrical information about subject-specific anatomy. This processing remains extremely challenging. To overcome this difficulty, we present an automatic atlas-based method that generates subject-specific FE meshes via a 3D registration guided by Magnetic Resonance images. The method extracts a 3D transformation by registering the atlas’ volume image to the subject’s one, and establishes a one-to-one correspondence between the two volumes. The 3D transformation field deforms the atlas’ mesh to generate the subject-specific FE mesh. To preserve the quality of the subject-specific mesh, a diffeomorphic non-rigid registration based on B-spline free-form deformations is used, which guarantees a non-folding and one-to-one transformation. Two evaluations of the method are provided. First, a publicly available CT-database is used to assess the capability to accurately capture the complexity of each subject-specific Lung’s geometry. Second, FE tongue meshes are generated for two healthy volunteers and two patients suffering from tongue cancer using MR images. It is shown that the method generates an appropriate representation of the subject-specific geometry while preserving the quality of the FE meshes for subsequent FE analysis. To demonstrate the importance of our method in a clinical context, a subject-specific mesh is used to simulate tongue’s biomechanical response to the activation of an important tongue muscle, before and after cancer surgery.

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