[MR tomography following kidney transplantation].

The results obtained by MR tomography in 30 patients after renal grafting are compared with the clinical and histological data in respect of corticomedullary contrast (CMC). In 22 patients with regular functioning of the transplant the CMC was normal at 19.4%. Eight MR examinations yielded a clearly reduced CMC below 14%. In 7 of these 8 patients it was possible to prove histologically the existence of an acute tubular necrosis or of a transplant rejection. Noninvasive MR tomography yielded an early indication for treating the acute renal transplant rejection without being able to differentiate between such a rejection and acute renal failure.