Renography

An examination of a kidney after injection of a radioactive substance, using a gamma camera.


The radiological study of the kidneys by a gamma camera following the intravenous injection of a radioactive substance, which is concentrated and excreted by the kidneys. The radioactive isotope (usually technetium-131) emits gamma rays, which are recorded by the camera positioned over the kidneys. The resultant graph of each kidney gives information regarding function and rate of drainage.


The radiological examination of the kidneys using a gamma camera. This is a device that can follow the course of an injected radioactive compound which is concentrated and excreted by the kidneys. This provides information on kidney function.


A method referred to as renal scintigraphy, which employs a radioactive substance to evaluate kidney function. Renography is rapid and painless, commonly employed in situations such as suspected urinary obstruction.


The radioactive material is introduced into the bloodstream, traveling through the kidneys and eventually reaching the urine. Radiation measurements are consistently recorded during the process, and both kidneys are evaluated concurrently to gauge their function comparatively. Typically, the radiation measurement increases and subsequently decreases as the material moves into the bladder. In cases of obstruction, the material accumulates within the kidneys, causing the measurement to keep rising.


 


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