PSMA PET Response Guided SabR in High Risk Pca

This study uses a specialized type of PET scan (a PSMA PET scan) to guide targeted radiation treatment called SABR for men with high-risk prostate cancer. The idea is to use detailed imaging to direct radiation precisely where it is needed, potentially improving outcomes while reducing side effects. **You may be eligible if...** - You are a man diagnosed with high-risk prostate cancer - You are scheduled for or being considered for radiation therapy - You are able to undergo a PSMA PET scan **You may NOT be eligible if...** - Your cancer has spread widely to multiple distant sites - You have had prior radiation to the same area that would exceed safe limits - You have serious health conditions preventing radiation therapy Talk to your doctor to see if this trial is right for you.