Under normal circumstances if the machine in the DR room is not operating, there is no radiation in the room, only the patient will be radiated during the examination. But currently the DR room has strict design standards, such as a minimum linear distance of more than 3.5m, the area of the house also has certain requirements. The walls, doors, and glass of the entire room are radiation-proof, and the unit has to be tested after it is built and qualified before it can be put into use. After the last patient finished a dozen seconds, the scattered radiation has basically disappeared, so when the next patient in the examination, there is basically no harm to the body, the patient need not worry too much. When the patient is doing the part of the examination, the doctor will make a lead suit for other important parts to cover up.