Chapter 1: Diagnostic Medical Imaging: X-ray projection technique, image subtraction method, direct digital x-ray imaging, computed tomography (CT)

摘要

In 1896 W.C. Rontgen announced the discovery of the potential of an at that time yet unknown type of radiation to penetrate materials and to cause opacification of photographic plates (after development). It turned out that various biological tissues attenuated this radiation differently such that the generation of projections of the human body onto a photographic plate was possible (Fig. 1.1). As the physical nature of the radiation was unknown, it was said to consist of "x-rays" - a designation which is still in use today.