RecruitingDrug trial[18F]-Fluoro-2-Deoxy-D-Glucose and -[18F] Dihydro-Testosterone Pet Imaging in Patients With Progressive Prostate CancerThis study will use PET scans, which is a type of x-ray test that uses a radiotracer, to see whether these scans may be better able to find places in the body where your prostate cancer may have spread.