There is no relationship between smoking and whether or not an enhanced CT examination was performed, so smoking is allowed after an enhanced CT examination. However, it is recommended to quit smoking in time, especially if the enhanced CT examination is performed due to disease factors, it is more important to quit smoking in time. 1. Absolute contraindications to enhanced CT include allergy to contrast media, inability to complete the examination due to unstable vital signs or mental status, etc. Smoking is not an absolute contraindication to enhanced CT. 2. However, smoking can cause obstructive pulmonary disease, atherosclerosis and other diseases, and also increase the incidence of lung cancer, prostate cancer and other cancers, so it is recommended to quit smoking in time. 3. In addition, enhanced CT is not a regular medical checkup program, mostly performed after the existence of certain diseases, smoking may slow down the healing of the disease. Smoking is harmful to your health, so it is recommended that you quit smoking; hospitals are public places, so please do not smoke.