Fig. 6From: Prostate deformation during hypofractionated radiotherapy: an analysis of implanted fiducial marker displacementExample of prostate deformation resulting in high RBE values due to filling of the rectum. Panel a shows the positions of the 4 FMs and their RBE values during the first fraction. Panel b shows the FM positions and RBE values during the fourth fraction, when the patient did not empty his rectum before the treatment (FM1 was disabled)Back to article page