Figure 1. Examples of contours of the ROI in the A) axial and B) sagittal planes. Panel C) represents an example of the equivalency of the superior borders of the bladder, prostatic bladder, and rectum. Regions of the bladder and the rectal wall adjacent to the prostate were labelled "prostatic bladder" or "prostatic rectum" while regions of these OAR further removed from the PTV were labelled "bladder" and "rectum".

ROI: Region(s) of Interest; OAR: Organ(s) at Risk; PTV: Planning Target Volume