[Spiral CT in parenchymatous disorders of the kidney].

Spiral-CT enables accurate diagnosis of renal parenchymal diseases and tumors, and when necessary, staging. Important prerequisites are optimal timing after injection of contrast medium and problem-tailored reformatting. In the optimal setting, this allows to reduce the examination time, the radiation dose, and the dose of contrast medium. Moreover, many other so-called complementary examinations as MRI, angiography, cavography, and diagnostic puncture can be avoided.