Ordinary CT, that is, ordinary CT plain scan, has relatively low definition. If there are still small nodules in the body, the development is not very clear. In this case, the doctor will ask the patient to do another CT enhancement.

Contrast agent, usually iodine preparation, is injected into the body under ordinary plain scanning conditions. Contrast media can cause allergies in very few people. In this case, the doctor in the CT room will ask the patient's family to sign an informed consent form, indicating that your family is willing to take the risk of possible allergies.