Just had a Urology work-up due to blood in my urine (2 years after finishing pc treatment). I started with a CT scan ( with contrast dye), then a cytoscopy (not pleasant, but tolerable), and a urine flow test (not all on the same day! Spread over a couple of weeks). The CT showed some scarring on my bladder from the radio therapy, but the tests found nothing amiss, and the consultant put the bleeding down to residual damage from the r/t. I imagine you will have something similar.