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Published on: April 18, 2013
The additional value of visual findings in captopril-enhanced renal scintigraphy with Tc-99m MAG3
M J Fleishman1, R L Greenspan, R L Van Heertum
1Department of Diagnostic Radiology, Columbia-Presbyterian Medical Center, New York, New York 10032.
Abstract:
Captopril-enhanced renal scintigraphy has become an important tool in the diagnosis of renovascular hypertension. The evaluation of these studies typically is based on a quantitative analysis of changes in renal radiotracer handling after angiotensin-converting enzyme inhibition. The use of mercaptoacetyltriglycine (MAG3) in these studies offers the optimum photon energy and high photon yield of a Tc-99m label with efficient renal extraction of tracer by tubular secretion. These qualities of Tc-99m MAG3 combine to produce high-resolution scintigraphic images that may supply additional valuable diagnostic information by visual assessment of the scintigraphic data. A series of cases illustrating the value of these visual findings is presented.
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