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99mTc-Sn-DTPA renogram curves and background curves were made using the data store play back system. Gain of each kidney was obtained from each renogram curve and background curve. Kidney gain was compared with renal plasma flow obtained from 131I-Hippuran renogram. Both correlated well and the coefficient index was 0.96. From our results, 99mTc-DTPA renogram was thought to be a useful examination of split renal function. Comparison of 99mTc-Sn-DTPA and 99mTc-Sn-DMSA renal scintigram disclosed that the former was superior to the latter in renal dynamic imaging and it was reverse in reno-cortical imaging. 99mTc-Sn-DTPA scintiscan would be a useful clinical examination of split renal function as well as of renal morphology.

Polyarteritis nodosa is a necrotizing arteritis usually affecting the medium-sized and small arteries as well as the arterioles. Although any organ may be involved, the viscera are most commonly affected. Among them the kidney is most frequently involved of all (more than 80 % of the cases) followed by cardiac and hepatic involvement. The diagnosis of polyarteritis nodosa is usually made clinically and confirmed by muscle biopsy. In our patient, 34-year-old male with hypertension, I[131}-renography and selective angiography were of big help for diagnosis of the disease.