DR radiography is a common radiology examination method that uses radiation to image the human body, mainly for the examination of the chest and skeletal system, such as in the chest to check whether the patient has pneumonia, tuberculosis, lung tumor, lung abscess, pleural effusion, pneumothorax, pleural space and mediastinal lesions, and in the skeletal system to determine whether the patient has a fracture, what type of fracture and the extent of the fracture. degree. After treatment can also be compared and observed, DR has higher resolution of density than ordinary CR, shorter examination time, and lower radiation exposure to the body.