An imaging technique in which, images are created using radiation technique showing blood flow from the arteries to the kidney is known as CT Renal Angiography.
A contrast is given through veins in the form of injection, which passes through the arteries.
This scan helps doctors to look for blockages of blood narrowing of the blood vessels, is the blood flow proper to the kidney or ballooning of the blood vessels.
It takes only about 30–90 minutes to perform the same.