If a pregnant woman occasionally outside the CT room does not have much impact, because the CT examination itself is through a special design, regardless of the walls and doors have radiation protection, can be isolated from the effects of radiation, so if a pregnant woman occasionally outside the CT room waiting for patients or relatives, the impact is not significant. It is also not recommended to be outside the door of the CT room often, just like the CT room doctors do a lot of protection, but it may also have an impact on the body over time, so an occasional time waiting for a patient outside the CT room will not have an impact. In addition, it is recommended to stay away from the CT room during pregnancy, stay away from the X-ray room, and do not get too close to these examination rooms without necessity or special circumstances.