1. No matter what equipment you have, there is always a computer room. The shielding problem was considered when the computer room was built. Therefore, the general projector does not need protective equipment. Unless the protective performance of the computer room is unqualified, protective equipment is required during the rectification. Generally, hospitals are required to entrust disease control departments to test the protective performance of computer rooms every year. If there is no monitoring, they can complain to the health supervision department.
2. Generally speaking, the radiation of CT is larger than that of ordinary medical X-ray machine, because the projection KV, current and time of the first CT are relatively large, the second CT scans spirally, and the irradiation area is large. The third CT has multiple rows, and multiple rows irradiate more radiation at the same time. When the computer room is well shielded, the radiation of CT and ordinary medical X-ray machines outside the computer room is very small, and some of them are basically close to the environmental background.