This test is done in the hospital x-ray department and takes about 60 minutes (1 hour).
The dye is injected into a vein, usually in the arm. It flows through your bloodstream to the kidneys. The doctor can watch the flow of the dye on an x-ray screen and see any abnormalities in the kidneys, bladder and the rest of the urinary system.
The dye may make you feel hot and flushed for a few minutes, but this feeling will go away. You may feel some discomfort in the tummy (abdomen), but this will only be for a short time. You should be able to go home as soon as the test is over.