tel-00426889, version 1 - 28 Oct 2009 Chapitre 2 : Mo<strong>de</strong> 2D kV, Objet-test LEEDS TOR18FG 2.5. Conclusions Conclusions Des outils logiciels capables d’effectuer un <strong>contrôle</strong> automatique <strong>de</strong> <strong>qualité</strong> <strong>de</strong> l’image embarquée (kV) ont été présentés dans ce chapitre. Des algorithmes pour la détection <strong>de</strong> la position et <strong>de</strong> l’orientation <strong>du</strong> fantôme ont été utilisés afin que les ROIs utilisées pour l’extraction <strong>du</strong> signal dans l’image soient parfaitement alignées sur les inserts constituant l’objet-test. Les <strong>qualité</strong>s <strong>de</strong> l’image en termes <strong>de</strong> contraste (haut et bas niveau), résolution spatiale, bruit et uniformité, taille <strong>de</strong> pixel et distorsions géométriques et linéarité <strong>du</strong> signal ont été contrôlées en utilisant l’objet-test LEEDS TOR18FG. Les résultats obtenus montrent l’efficacité <strong>de</strong> ces outils pour un <strong>contrôle</strong> <strong>de</strong> <strong>qualité</strong> automatique, objectif, repro<strong>du</strong>ctible, et rapi<strong>de</strong>. Le <strong>contrôle</strong> automatique complet est effectué en moins <strong>de</strong> 2 secon<strong>de</strong>s, alors qu’en analyse « manuelle » ce <strong>contrôle</strong> prend 2 heures. 77
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