Dynamic scintigraphy, a non-invasive method, is suitable due to its sparing procedure in particular in clinical conditions where more pretentious examination methods are contraindicated or risky. Very frequently it can serve as a guide for more aimed examination methods. Its diagnostic value is great in particular where pathological conditions of the efferent urinary pathways are concerned, i.e. above all fistulae. In parenchymatous lesions it provides information on focal processes of an inflammatory and non-inflammatory nature. Investigation of both functions, of perfusion and transport of hippuran is sometimes a supplement for the differentiation of ATN and rejection nephropathies. The distribution of perfusion after administration of technetate helps to detect occlusion of the afferent arteries and minor arterioles.