what is involved in a kidney scan
A kidney scan is done to: 1  Check the blood flow through the kidneys. 2  See how a transplanted kidney is working. 3  Check the extent of kidney damage caused by an injury or infection. 4  Find an obstruction in the kidney or ureter, such as from a kidney stone. 5  Find growths in the kidneys (rare).uring a scan to look at kidney function, a radioactive tracer substance is injected into a vein in the arm and then travels through the bloodstream to the kidneys. The tracer flows through the blood vessels in the kidneys and then is excreted into the urine.