The full name of DR is Digital Radiography, also known as digital radiography. It is a step-by-step development from traditional X-ray to digital radiology. First of all, the dose of DR examination has been significantly reduced compared with traditional radiography. Secondly, the image quality and resolution of DR imaging has improved significantly compared to traditional radiography, especially for the display of subtle lesions such as fractures, which are significantly improved compared to traditional radiography, so DR examination is an inevitable trend in the development of science and technology.