ADAPTATION DES METHODES DE RECONSTRUCTION 3D RAPIDES PAR STÉRÉORADIOGRAPHIE : MODÉLISATION DU MEMBRE INFÉRIEUR ET CALCUL DES INDICES CLINIQUES EN PRÉSENCE DE DÉFORMATION STRUCTURALE

Abstract : The anatomy of the lower limb and its 3D angular abnormalities are paramount in diagnosis, therapeutic applications and/or surgical planning. In this context, it is important to explore this knowledge in three dimensions. Within a collaborative project between the Laboratoire de Biomécanique (Paris) and the Laboratoire de recherche en Imagerie et Orthopédie (Montréal) 3D reconstruction methods have been developed based on the EOS™ imaging system (Biospace Med, Paris). These methods allow clinical analysis in standing position with low radiation dose. However, despite their accuracy, these reconstruction techniques are time-consuming and therefore difficult to use on a routine basis in clinical environment. The aim of this Ph.D. thesis is to adapt and optimize these methods for lower limb's bony structures with structural distortions. We developed and evaluated a reconstruction method of the lower limb based on parametric models of femurs and tibias and statistical inferences. This method provides a preliminary so-called “simplified” model of the lower limb in approximately 1 minute, allowing an accurate and reproducible computation of most currently used clinical parameters. Starting from the “simplified” model, we calculated an accurate customized 3D reconstruction of the lower limb in approximately 5 minutes. Based on this 3D model, we developed and validated several calculation modes for a larger panel of clinical parameters (including torsions and rotations) in order to identify the most robust and pertinent ones that could be standardized for clinical practice. The current work opens practical perspectives for the clinical transfer of such methods to be used in practice. One of the most clinical popular applications of the 3D reconstruction techniques and clinical parameters calculation is the surgical planning of lower limb osteotomy and arthroplasty.
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Submitted on : Sunday, October 10, 2010 - 5:55:33 PM
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Yasmina Chaibi. ADAPTATION DES METHODES DE RECONSTRUCTION 3D RAPIDES PAR STÉRÉORADIOGRAPHIE : MODÉLISATION DU MEMBRE INFÉRIEUR ET CALCUL DES INDICES CLINIQUES EN PRÉSENCE DE DÉFORMATION STRUCTURALE. Modélisation et simulation. Arts et Métiers ParisTech, 2010. Français. ⟨NNT : 2010ENAM0013⟩. ⟨pastel-00524999⟩

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