This research study is for men with intermediate- or high-risk prostate cancer who are planning to receive hormone therapy and radiation treatment. The purpose of the study is to see whether a special type of diagnostic imaging done during hormone therapy can help doctors more accurately target remaining cancer with radiation, while avoiding areas that may no longer need extra treatment. All participants will receive standard hormone therapy and radiation therapy, along with three imaging scans, over a six-month period. The information gained from this study may help make prostate cancer radia