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Computed Tomography Contrairement au cas des applications médicales, l'objet inspecté en Contrôle Non Destructif (CND) peut être très grand et composé de matériaux de haute atténuation, auquel cas l'utilisation d'une trajectoire circulaire pour l'inspection est impossible à cause de contraintes dans l'espace. Pour cette raison, l'utilisation de bras robotisés est l'une des nouvelles tendances reconnues dans la CT, car elle autorise plus de flexibilité dans la trajectoire d'acquisition et permet donc la reconstruction 3D de régions difficilement accessibles dont la reconstruction ne pourrait pas être assurée par des systèmes de tomographie industriels classiques Une cellule de tomographie X robotisée a été installée au CEA. La plateforme se compose de deux bras robotiques pour positionner et déplacer la source et le détecteur en vis-à-vis. Parmi les nouveaux défis posés par la tomographie robotisée, nous nous concentrons ici plus particulièrement sur la limitation de l'ouverture angulaire imposée par la configuration en raison des contraintes importantes sur le mouvement mécanique de la plateforme. Le deuxième défi majeur est la troncation des projections qui se produit lorsque l'objet est trop grand par rapport au détecteur. L'objectif principal de ce travail consiste à adapter et à optimiser des méthodes de reconstruction CT pour des trajectoires non standard, Nous étudions à la fois des algorithmes de reconstruction analytiques et itératifs. Avant d'effectuer des inspections robotiques réelles ,
Imagerie et de Simulation pour le Contrôle (DISC) Laboratoire Vibrations Acoustique (LVA) Directeur de thèse: Valérie KAFTANDJIAN Président de jury : Françoise PEYRIN Composition du jury thèse est accessible à l'adresse : http://theses.insa-lyon, Laboratoire ,