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June 21, 1965

The Radioisotope Renogram: A Comparison of Qualitative and Quantitative Interpretation

Author Affiliations

From the Radioisotope Service, Veterans Administration Center, and the Department of Medicine, School of Medicine, University of California Center for the Health Sciences, Los Angeles.

JAMA. 1965;192(12):1032-1034. doi:10.1001/jama.1965.03080250010002

To determine whether interpretations of radioisotope renograms by qualitative visual inspection were reproducible, a total of 60 randomly assembled renograms, including those of 13 patients with proved unilateral renal hypertension, were subjected to reinterpretation by the initial observer. Fifty-six of the interpretations were in complete agreement. All 13 cases of renovascular hypertension were correctly identified both times. When two quantitative methods of interpretation were applied to renograms of the group with unilateral renal hypertension, diagnostic accuracy was significantly decreased.