68Ga-RM2 PET/CT in Detecting Regional Nodal and Distant Metastases in Patients With Intermediate or High-Risk Prostate Cancer

PRIMARY OBJECTIVES: I. To evaluate 68Ga-RM2 PET/CT for detection of intermediate and high-risk prostate cancer prior to prostatectomy. OUTLINE: Patients receive 68Ga-RM2 intravenously (IV). Within 45-60 minutes, patients undergo a PET/CT scan. Patients may undergo a second PET/CT scan immediately after the first scan for attenuation correction. Patients may undergo also a repeat 68Ga-RM2 PET/CT scan after the completion of their treatment to evaluate response to therapy, if requested by the treating physician. After completion of study, patients are followed up at 24-48 hours and within 3-12 months.