How often can I take a dr chest X-ray for the second time?

No special requirements. The amount of DR rays is very small, and normal examination is harmless to the body, so there is no special time requirement for the second DR chest film. DR chest radiograph, also known as digital X-ray photography, takes the image intensifier tube as the information carrier, receives the X-ray information transmitted through the human body, converts it into digital signals after being collected by the camera, and then carries out digital processing.