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Validity of Renal Split Function by Single Probe Renography in Hypertensive Patients

Single kidney function was determined both by single probe renography (131I hippuran) and gamma camera scintigraphy (99Tcm DMSA) in the sitting position in 42 consecutive patients who were referred to renography as a part of the workup of their hypertension. The positioning of the detectors turned out to be satisfactory in 83 per cent of the patients when compared with the determination of the split function at scintigraphy. This might be explained by the small 100 per cent isocount area of the probe (avoiding the effect of mobile kidneys) and by the 4-channel localization system.