The small intestine usually refers to the duodenum, jejunum, and ileum, and the jejuno-ileum. Enhanced CT exams can detect lesions such as inflammation, intestinal polyps, tumors, abnormal obstructions or strictures, as well as conditions of the peripheral mesentery of the intestines, the omentum, and the lymph nodes. Enhanced CT of the small intestine is based on plain CT using a contrast agent such as iodine to show the blood supply to the diseased structures. Enhanced CT can detect tumors or polyps in the walls of the digestive tract, tumor lesions in the tissues surrounding the intestines, mesenteric lesions, intestinal obstruction, and intestinal strictures. It is important to note that before performing the test, it is recommended to avoid the use of medications containing heavy metal components, and before performing the test, try to maintain a fasting state to avoid the influence of food on the test. When abnormal lesions such as intestinal tumors in the duodenum, jejunum and ileum appear or are suspected, it is recommended to go to the hospital in time.