Évaluation des mouvements des différentes portions anatomiques de la vessie, implications pour la radiothérapie guidée par l'image pour les cancers de vessie

Significant bladder wall displacements were observed on the anterior wall and upper portion of the bladder. Isotropic margins may not be sufficient to account for inter- and intrafraction bladder wall displacements at the latter levels. Tailored bladder anatomy-based anisotropic margins may be necessary to optimally spare the small intestine and to guaranty proper tumour coverage in case of bladder cancer. For upper bladder tumours, margins of over 2 cm would be necessary, which make them less adequate for external beam irradiation.