Accompanying a patient for a CT, or computed tomography scan, is not harmful, and the radiation dose from a single computed tomography scan is safe and will not affect your health. Computed tomography is a tomography scan of the human body using X-ray beams, computerized images, which are used by doctors to diagnose diseases. The X-ray output of computed tomography equipment is strictly controlled, and the radiation dose is small, an abdominal computed tomography radiation dose of about 8 millisieverts, a head computed tomography radiation dose of only 2 millisieverts. Theoretical studies have shown that a radiation dose of more than 10 mSv is likely to increase the lifetime risk of cancer by 0.05%. Routine computed tomography scans are less than this theoretical value and do not affect health. On the other hand, when performing a computed tomography scan, the family members accompanying the patient will usually wear lead clothing, which can protect the important parts against CT radiation. Overall, it is safe to accompany a patient for a CT scan. However, if the patient is conscious and able to cooperate with the examination, try to let the patient be in the examination room by himself/herself without a chaperone. In addition, women preparing for pregnancy and pregnant women should not be accompanied together.