How MRI helps guide prostate cancer treatment When men hear about treatments like TULSA-PRO, one common question is: How do doctors know they’re treating the right area — and that it’s actually working? In this clip, Geoffrey Sonn, Associate Professor of Urology at Stanford Medicine, explains how MRI plays a critical role before and during treatment. In plain language: • MRI helps identify where the cancer is located • It helps plan how much tissue around the tumor should be treated, based on wh