Radioisotope renography

Radioisotope renography is a form of medical imaging that uses radioactive decay to generate images of the kidneys. This technique is primarily used to evaluate renal function and diagnose certain kidney disorders.

Overview

Radioisotope renography involves the injection of a radioisotope, typically Technetium-99m, into the patient's bloodstream. This radioisotope emits gamma rays that can be detected by a gamma camera. The camera tracks the movement of the radioisotope through the kidneys, allowing physicians to assess renal function and identify any abnormalities.

Procedure

The procedure begins with the patient lying on a table beneath the gamma camera. A healthcare professional then injects the radioisotope into a vein, usually in the arm. The patient is asked to remain still as the camera captures images of the kidneys. The entire procedure typically takes about an hour.

Applications

Radioisotope renography is used to diagnose a variety of kidney disorders, including renal artery stenosis, hydronephrosis, and renal failure. It can also be used to monitor the progress of patients who have undergone kidney transplantation.

Risks and Complications

As with any procedure involving radiation, there is a small risk of radiation exposure. However, the amount of radiation used in radioisotope renography is typically very low. Other potential complications include allergic reactions to the radioisotope and discomfort at the injection site.

See Also

• Nuclear medicine
• Renal scintigraphy
• Renal function