Under normal circumstances, it is not recommended to do enhanced CT after eating, because enhanced CT needs to scan the patient through intravenous injection of contrast agent, although in most cases the contrast agent is very safe, but there are a small number of patients are prone to a variety of allergic reactions. If an allergic reaction occurs during the examination, and the patient eats a meal, it will easily lead to vomiting and choking of vomit, which can seriously endanger the patient’s life. In addition, if the patient is doing abdominal enhancement CT, also need to fasting, eating has a certain impact on the display of abdominal organs, will affect the diagnostic results.