CT and MRI can be done together, either as a plain examination or an enhanced one, without affecting their diagnostic results. For enhanced CT, patients are required to fast for the previous meal and will be asked in detail about their medical history, such as whether they have severe hyperthyroidism or are allergic to iodine contrast agents, both of which are contraindications. In addition, the examination of MRI requires patients not to place metal-like implants in the body, if the body contains metal-like implants, can not do MRI, because the principle of MRI is to scan through the magnetic field, which may affect the movement of plants in the patient’s body.