Dual PSMA and FDG PET Imaging for Patients With Advanced Prostate Cancer

This study is using two types of PET scans — a standard FDG scan and a newer PSMA scan — to monitor how well treatment is working in men with advanced, metastatic prostate cancer. Using both scans together may give a more complete picture of how the cancer is responding. **You may be eligible if...** - You are a male aged 18 or older - You have been diagnosed with metastatic castration-sensitive prostate cancer (mCSPC) — meaning the cancer has spread but still responds to testosterone-blocking therapy - You are starting or have recently started androgen-deprivation therapy (ADT) with a hormone-blocking drug - You are receiving care at Princess Margaret Cancer Centre **You may NOT be eligible if...** - You are enrolled in a randomized clinical trial with restrictions on additional imaging - You have had a PSMA or FDG PET scan within the last 60 days at a required study time point Talk to your doctor to see if this trial is right for you.