Renogram (radioisotope nephrography)

The basic principle of each scintigraphy is that a radiant substance (radionuclide) is temporarily stored in certain parts of the body and then completely excreted.

 

The damage caused by these radiant substances is negligible. In the case of renal scintigraphy, technetium is usually applied intravenously two hours before the examination. This is then distributed to the kidneys, renal pelvis, ureter, and bladder. Using a gamma camera, the radiation intensity can then be measured at different time points. With renal scintigraphy, the renal function of both sides can be assessed separately. It can also be determined whether a ureteral constriction or other obstruction is functionally relevant. Renal function can be also measured and expressed in absolute values. 

 

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