Small bowel imaging is mainly used to examine lesions of the small intestine, such as chronic inflammation of the small intestine, bleeding, diverticula and duplication of malformations, tumors, intestinal adhesions, intestinal obstruction as well as to clarify the function of the small intestine by dynamically observing the peristalsis of the small intestine. Small bowel imaging is a test to rule out small bowel diseases by dynamic abdominal X-ray examination after oral administration of contrast agents such as barium or iodized water. Because the small intestine is thin and long, direct examination such as small bowel examination is difficult and requires general anesthesia, which is costly, and capsule endoscopy is expensive, so the clinical use of relatively few. Therefore, to rule out small bowel disease in the clinic is often through the indirect small bowel imaging examination to clarify. Different lesions have different manifestations under small bowel imaging, and different X-ray manifestations after imaging can clarify whether it is inflammation, bleeding, tumor, diverticulum and duplication deformity, as well as intestinal adhesion, intestinal obstruction and so on. At the same time, the peristalsis of the small intestine can be continuously observed under the contrast to clarify whether there are functional diseases. However, small bowel imaging is not everything, it is after all only an indirect examination, for some very small lesions line imaging may not necessarily be able to clearly show, so you need to go further to the small bowel or capsule endoscopy.