An Imaging test that studies, diagnosis and examine the urethra and bladder while passing the urine using x-ray-dye is known as Micturating Cysto-Urethrogram (or MCU).
This test helps to understand if the urine goes to the urethra as it should or it goes back up to the kidney.
It takes only about 10-20 minutes to perform the same.
It is a safe technique that does not harm the human body