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reconstruction de formes pour la chirurgie assistée par ordinateur basée sur l'enregistrement

Markus Fleute 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 : This thesis addresses the problem of reconstructing 3D anatomical surfaces based on intraoperatively acquired sparse scattered point data and few calibrated X-ray images. The approacli consists in matching the data with a statistical deformable shape rnodel thus incorporating a priori knowledge into the reconstruction process. Computing such a statistical model requires prior shape analysis in a given population. A new method based on a generic model of the object is used to segment training shapes and to establisli point to point correspondence simultaneously in a set of CT images. Scattered point data are then matched witli the statistical model using a non rigid 3D/3D registration algorithm. The application of this method for intra and extrapolation of sparse point data is demonstrated within a system for computer assisted reconstruction of the anterior cruciate ligament. To reconstruct a surface from few calibrated X-ray images the statistical shape model is matched to the object contours segmented on the calibrated X-ray images based on a new non rigid 3D/2D registration method. Experiments are performed on a statistical model of lumbar vertebrae for the clinical application of pedicle screw placement. It is further shown that hybrid matching combining both, 3D/3D and 3D/2D registration, miglit be an interesting option for certain Computer Assisted Surgery Applications. Abstract
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Submitted on : Wednesday, March 17, 2004 - 11:43:56 AM
Last modification on : Tuesday, November 24, 2020 - 4:18:04 PM
Long-term archiving on: : Friday, April 2, 2010 - 7:47:32 PM


  • HAL Id : tel-00005365, version 1



Markus Fleute. reconstruction de formes pour la chirurgie assistée par ordinateur basée sur l'enregistrement. Autre [q-bio.OT]. Université Joseph-Fourier - Grenoble I, 2001. Français. ⟨tel-00005365⟩



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