What is the test used to evaluate function of kidneys after IV injection of a radioactive tracer?

The test used to evaluate kidney function after intravenous injection of a radioactive tracer is called a renal scintigraphy or renal scan. This imaging technique utilizes a radiotracer, such as technetium-99m, to assess renal blood flow, function, and morphology. The resulting images help determine how well the kidneys are working and can identify conditions like obstructions or renal diseases.