Imaging and staging of prostate cancer is critical for surgical and treatment planning. Patients with suspected metastatic prostate cancer will be imaged using Gallium-68 labeled PSMA-11 in order to demonstrate its utility. The investigators plan to utilize this data to obtain further approvals of the Ga-68-PSMA-11 compound, so that this agent will become available for clinical imaging in prostate cancer patients. In the biochemical recurrence population, the primary objective is to determine the sensitivity and positive predictive value (PPV) on a per-patient and per-region-basis of 68Ga-PSMA-11 PET for detection of tumor location confirmed by histopathology/biopsy.