[18F]-Fluoro-2-Deoxy-D-Glucose and -[18F] Dihydro-Testosterone Pet Imaging in Patients With Progressive Prostate Cancer

Registered patients will undergo PET scanning using either FDHT alone or FDG and FDHT depending on the clinical question being asked. Scans will be performed serially at baseline, week 4, week 12, and every 12 weeks of treatment up to a maximum of 8 FDHT/FDG scan set in a 12 month period (maximum 40 scan sets per lifetime) unless the therapeutic protocol or scientific rationale of the therapeutic drug being applied specifically dictates an alternative schedule. Patients may have blood drawn for the purposes of establishing the pharmacokinetics of FDHT and may also undergo an initial dynamic scan if further pharmacokinetic information is warranted, followed by a standard whole body image. If no further pharmacokinetic information is warranted, then patients will only undergo a standard whole body image.