[State of the art of digital subtraction angiography in diagnostic angiology].

Digital subtraction angiography (DSA) has become a widely accepted method which has decreased the risks of angiographic investigations. Intravenous DSA is the preferred method for screening investigations of carotid and renal arteries and in postsurgical control studies. Intraarterial DSA will be indicated if a detail information is required. The technical principles of time and energy subtraction will be explained, the different methods of contrast medium application will be discussed.