It is important to have a family member accompany the patient during coronary CT because it is a complex test that requires the patient’s close cooperation in order to be completed successfully. 1. Coronary CT for the older elderly, patients with poor ability to cooperate or children, it can not be very good with the examination, therefore, need to be accompanied by family members, so that the examination can be carried out smoothly. 2. Coronary CT requires the patient to be at a stable heart rate, and the accompaniment of family members will relieve the patient’s anxiety and reduce heart rate fluctuations. 3. Coronary CT imaging carries a certain risk, and if an allergic reaction to the contrast medium occurs, the family needs to be informed and communicated in a timely manner, therefore, the family needs to be present and actively cooperate to minimize the risk of occurrence. Coronary CT is used to check whether there is stenosis in the coronary artery, and its adverse reactions include allergic reaction to contrast medium and renal function impairment, etc., which should be carried out in strict accordance with the doctor’s instructions.