Keywords: 103Pd, palladium-103, Gy, gray; 18F-DCFPyL, 2-(3-(1-carboxy-5-[(6-[18F]fluoro-pyridine-3-carbonyl)-amino]-pentyl)-ureido)-pentanedioic acid; 99mTC, technetium 99m; ADT, androgen deprivation therapy; CT, computed tomography; Local recurrence; MRI, magnetic resonance imaging; Molecular imaging; PET, positron emission tomography; PSA, prostate-specific antigen; PSMA; PSMA, prostate-specific membrane antigen; Prostate cancer; Radiotherapy; SABR, stereotactic ablative radiotherapy; SUVmax, maximum standardized uptake value.