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Comparison of Methods for Renogram Evaluation

Veterans Administration Center, Wood, Wisconsin

Correspondence: For reprints contact: R. C. Meade, Radioisotope Service, Veterans Administration Center, Wood, Wisconsin 53193.

ABSTRACT

Sixty-eight normal and 104 abnormal renograms were evaluated according to 19 individual kidney parameters and 11 ratios of one kidney to the other. Good agreement was obtained with normal values of other authors for parameters which were not dose dependent. In general, the greatest diagnostic accuracy was obtained for parameters dealing with the drainage phase of the renogram. The time to return to 50% of peak was 90% accurate in detecting both the normal and abnormal renogram. The ratios were of questionable value in detecting bilateral or unilateral abnormal renograms. The absolute differences between the two kidneys was likewise of little value in detecting abnormal renograms. In the hydrated, seated patient, it appears possible to evaluate accurately the renogram without standardized equipment or dose.