X-ray photography is divided into

CR (Computerized Radiography) is also called indirect digital X-ray imaging technology. Its main principle is to use storage phosphors for imaging. 198 1 year, Fuji Company of Japan launched the first CR for clinical use, and then Kodak Company of the United States and Akefa Company of Germany successively launched their own CR products. It uses an IP plate composed of phosphorescent crystals to absorb X-ray information, and exposes the IP plate to form a latent image. The IP board looks like a 1 ordinary intensifying screen, and consists of a substrate and a phosphor material. The working principle of R, DR(Digitalradiography), is also called digital photography. In the early days, DR used CCD (digital coupler) to couple with intensifying screen and optical lens to obtain digital X-ray images, which is somewhat similar to the working method of image intensifier and CCD. This technology is considered as the first generation of disaster recovery technology.