Frequent CT is harmful to the body, and CT radiation is generally hundreds of times more than that of X-ray films. CT examination is the main basis for disease diagnosis and is an imaging method. for patients with cerebral hemorrhage and cerebral infarction in the acute stage, CT examination can clarify the diagnosis, and can also be used to examine abdominal lesions and lung lesions, etc. CT examination generally does not require special preparation CT examinations can also be used to examine intervertebral discs, etc. Patients who undergo intensive CT examinations may suffer more damage to their bodies.