1. dr, also known as digital X-ray photography, is an examination method that develops according to the density of different tissues or organs of human body. It converts the X-ray information that penetrates human body into digital signals through a detector, and then reconstructs the image by a computer and some post-processing to obtain an image satisfying the clinical diagnosis.
2. It has the advantages of short imaging time, convenient transmission, storage and remote diagnosis, and high working efficiency. The radiation dose of dr is 2/3 of that of cr, and it is mainly used in the diagnosis of lung and skeletal system in clinic.