Enhanced CT of the abdomen can examine the following types of diseases: 1. congenital malformations: including abdominal visceral transposition, congenital megacolon and other diseases; 2. inflammatory diseases: including intestinal obstruction, appendicitis, cholecystitis, perforation of the gastrointestinal tract and other inflammatory diseases, manifesting as thickening of the organs, exudation and other manifestations of inflammatory reactions around them, and in severe cases, manifestations of peritoneal effusion and dilatation of the intestinal canal; 3. tumorigenic or occupying lesions: Enhanced CT has a certain differential diagnostic value for organ-occupying lesions, and can determine the benignity and malignancy of organ-occupying lesions such as liver and pancreas according to the speed and strength of contrast in and out. Pancreatic cancer is a lack of blood tumor with insignificant enhancement, while pancreatic endocrine tumor is a rich blood supply tumor with more obvious enhancement. It has certain diagnostic and differential value for tumors of cavernous organs, including stomach and colorectal tumors, which can be detected initially by CT and can be diagnosed basically by further endoscopic examination.