Evaluation of the Effects of Chemotherapy on the Uptake and Retention of Carbon 11 Methionine in Prostate Cancer Patients

In the week before the patients first dose of chemotherapy they will receive a C11 methionine PET scan which takes about 90 minutes. C11 methionine is a radioactively labeled amino acid that is given to the patient intravenously. Eighteen to twenty days after the patients first dose of docetaxel chemotherapy, they will have another C11 methionine PET scan which is identical to the first scan. At the end of three cycles of docetaxel chemotherapy (about 2 and 1/2 months on study) another C11 methionine PET scan will be done. The PET scans will show how well the tumor is taking up methionine.