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<dc:title xml:lang="en">Analysis and correction of OCT images for the control of robotic flexible endoscopes</dc:title>
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<dc:subject xml:lang="fr">Fonctionnement en boucle fermée</dc:subject>
<dc:subject xml:lang="fr">Segmentation multi-surfaces</dc:subject>
<dc:subject xml:lang="en">Optical coherence tomography</dc:subject>
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<dcterms:abstract xml:lang="fr">L'objectif de cette thèse est d'automatiser l'imagerie robotique en permettant une opération en boucle fermée pour une numérisation automatique précise en présence de mouvement tissulaire. Tout d'abord, un problème spécifique des cathéters OCT de numérisation rotative, appelé distorsion de rotation non uniforme(NURD), qui entrave les tâches de diagnostic et de navigation, est examiné. Une nouvelle solution pour la correction en ligne est proposée. Ensuite, un algorithme de segmentation multi-surfaces d'images OCT à vision latérale est développé, qui est également adapté à l'échographie intravasculaire (IVUS). Un pipeline d'apprentissage fédéré décentralisé est démontré pour former le réseau d'encodage de lignes A avec des images OCT et IVUS, améliorant les performances du réseau. Enfin, une rétroaction en temps réel est fournie pour la numérisation volumétrique robotique, en maintenant les tissus mous dans le champ de vision et en limitant la force de contact.</dcterms:abstract>
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