The international symposium CAR '89 (the third in a row), held in Berlin in June 1989, was again focused on the fundamental principles of applying Computer Assisted Radiology (CAR) in health care. The book contains all the presentations of the symposium and this provides an up-to-date, complete state-of-the-art-report of this interdisciplinary subject, in which physicians, engineers, physicists and computer scientists cooperate.