Changes in the Pelvic Anatomy After an IMRT Treatment Fraction of Prostate Cancer

To quantify the three-dimensional variations of pelvic anatomy after a single treatment fraction.Forty-six prostate cancer patients underwent computed tomography (CT) scanning with an in-room CT-on-rail system, before and immediately after one intensity-modulated radiotherapy (IMRT) session. To study the soft-tissue anatomy changes, the pre- and post-treatment CT images were registered using the bony structure with an in-house image registration...