X-rays are a kind of electromagnetic wave with a very short wavelength, and the wavelength range of medical X-rays is about 0.008-0.031nm. X-rays are mainly produced by the high-speed electron group hitting the material when it is suddenly blocked. The above is the imaging principle of X-ray. The above is the imaging principle of X-ray. In clinical practice, X-ray is mainly used for fluoroscopy, radiography, CT, DSA and other related examinations, and the application range is relatively wide.