CT do more on behalf of the radiation to the human body radiation is relatively large, but radiation damage to the human body has been produced in an instant, there is no way to do to remedy, the patient can only minimize after the CT examination, if there is discomfort can be done to do blood tests to see the white blood cells or to see if there is a problem with other indicators of the blood system, and other organs can also do the corresponding discomfort is not radiation. Other organs can be examined without radiation, such as ultrasound or magnetic resonance imaging (MRI). Under normal circumstances, the average person is not recommended to do more than 2-3 times a year CT examination, is relatively safe, if it is due to the needs of the disease, you can weigh the pros and cons of the appropriate increase in the number of CT examination, and the doctor will also be based on the patient’s condition as much as possible to choose the body of the examination method of low radiation.