CT scanning has some harm to the human body, CT scanning using radiation to scan the human body, the human body will have a radiation effect, but the harm is particularly small. The general radiation dose is much lower than the national regulations within the safety range, as long as it is not aimless, frequent CT scanning, the damage is negligible, the radiation dose and the natural background radiation dose is about the same, the patient does not have to be too nervous. Relative to the diagnosis of disease or treatment of disease, a little harm is nothing, now the machine is more and more advanced, CT models, rows of technology is more and more high, the scanning time is getting shorter and shorter, more and more low radiation to the human body.