RecruitingProstate Cancer Postoperative Stereotactic Body Radiotherapy With Adaptive Technology for Minimizing ToxicitySingle-arm, prospective registry study assessing changes in acute patient-reported urinary (GU) and gastrointestinal (GI) quality of life at the 24-month post-treatment time point following magnetic resonance imaging (MRI)-guided or computed tomography (CT)-guided stereotactic body radiotherapy (SBRT) delivered to the prostate bed +/- pelvic lymph nodes. The decision to offer an adaptive treatment will be at the clinician's discretion.