CT is done twice a month with very little harm. CT is the use of radiation scanning imaging, radiation produced by the radiation dose is very small, the harm to human health is also very small. Moreover, before the CT examination, radiologists will take protective measures, such as allowing patients to wear protective clothing, etc., to do a good job of safety protection, radiation dose control within the safe range, basically do not have to worry about radiation damage to the body. If the condition really needs, the doctor may let the patient do CT twice a month, do a good job with can, do not have to worry too much about the risk of radiation. It should be noted that young children are in the period of physical development, can not do CT examination, it is not recommended to do, so as not to affect the normal growth and development of young children.