Renal Function Studies with Radioisotopes

Renal function studies with radioisotopes are based on the physiological conditions of the renal excretion mechanisms and the radiopharmacology. The available techniques vary, but here the discussion is restricted to the clearance measurements, the radiorenography and renal function studies in regions of interest using a scintillation camera. Experiences with more than 200 examinations by means of the last method are described in detail. Although the function of each kidney in many cases can be studied by the conventionally performed renogram, renal function studies made as an integral of distinct regions of interest together with sequential scintigrams give excellent functional and morphological information on each kidney as a whole as well as on selected areas. (author)