In nearly all areas of technology our generation is experiencing the phenomena of fast paced innovation and great bursts in development. Besides the completely new techniques, the "experienced user" is astonished when obviously good and appar ently matured technology such as the next to last generation of CT equipment undergoes further development, such as is the case with the spiral CT technique. The enormous potential of spiral CT suddenly became apparent, stimulating and giving rise to a wide range of research on its clinical application. Yet again we can see in the field of imaging how...