Medical Content Created by the Faculty of the
Harvard Medical School
By filling your bladder with a liquid dye that shows up on x-rays, your doctor can watch the motion of your bladder as it fills and empties and can see if your urine splashes backwards toward your kidneys as the bladder muscle squeezes. This kind of test can help your doctor to better understand problems with repeated urinary tract infections or problems involving damage to the kidneys. It can also be useful for evaluating urine leakage problems.