Working principle of cr

CR (Computerized X-ray Photography) 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 made of phosphorescent crystals to absorb X-ray information, and the IP plate is exposed to form a latent image. The IP board looks like a 1 ordinary intensifying screen. It is composed of a substrate and phosphor materials, and the outer layer is protected. Then it is protected by a cassette, which can be taken like an ordinary X-ray cassette. After X-ray exposure, the IP board stores X-ray image information in the crystal, and then sends it to the IP board for reading and displaying, and the read X-ray image information is sent to the computer system. After the image information is read out, the information stored on the IP board disappears, and the imaging board can be reused. Advantages: The exposure dose of (1)CR is smaller than that of conventional photography; (2) The requirements of photographic conditions are lower than those of film, and there is almost no "waste film"; (3) When CR is adopted, the X-ray equipment does not need to be greatly changed, and the shooting process is unchanged from the original X-ray film photography; (4) Image post-processing function can improve the accuracy of image diagnosis and the scope of disease diagnosis.