For comparative study, 131 I OIH renogram was carried out in 40, serum BUN and Cr assay in 20 and ultrasonography, KUB, IVU in 40. The coincidence rate of diagnosis was 73%, 75% and 90% respectively.

• 40例病人同时作肾图，20例作血清尿素氮和肌酐检查，40例做B超、KUB、IVU检查，符合率分别为73%25、75%25和90%25。