[Renography and renal imaging with 123I-orthoiodohippurate; comparison with 131I-orthoiodohippurate]

Renography and renal imaging with 123I-orthoiodohippurate (OIH) were performed in 29 patients with various renal diseases, and a comparison made with 131I-OIH. In all patients, renograms and images with 123I-OIH were superior to those with 131I-OIH, because of the increased density and image excellence of 123I-OIH. In addition, dynamic images to evaluate renal blood flow, as well as high quality sequential excretion images, can be obtained with 123I-OIH. From our clinical results, 123I-OIH is expected to replace 131I-OIH in renal function studies.