CT examination of the whole abdomen can observe the abdominal organs, and it is less effective for cavity organs and more accurate for solid organs, specifically the following organs can be examined: 1. Liver: to observe whether there is any liver abnormality, such as fatty liver, cirrhosis, and hepatic space-occupying lesions; 2. Spleen: it is located in the left upper abdomen, and it can determine the size of the spleen, and whether there is any space-occupying; 3. Stomach: it is located in the upper abdomen, and it is possible to find out gastric lesions and changes in size through CT. lesions as well as size changes, with or without gastric dilatation caused by localized pyloric stenosis; 4, gallbladder: it can determine whether there are bile duct lesions, such as gallbladder stones, biliary stenosis or biliary dilatation; 5, duodenum: to observe whether there is duodenal occupation or dilatation; 6, pancreas: including pancreatic head, pancreatic body, pancreatic tail, with or without space-occupying lesions; 7, kidneys: bilateral adrenal glands and kidneys, and it can be clarified whether there are any relevant abnormalities through CT; 8, small intestine: through abdominal CT, it can be determined whether there are any relevant abnormalities; 8 Small bowel: through abdominal CT, observe the small bowel with or without dilatation lesions, can also be seen in the case of intestinal obstruction, small bowel dilatation, stenosis junction, that is, where the obstruction is located; 9, colon: including the cecum, ascending colon, transverse colon, descending colon, as well as the sigmoid colon, the upper part of the rectum, it can be clearer in the abdominal display; 10, bladder: through the CT examination of the presence or absence of disease; 11, the appendix: relatively tiny, if swollen, inflamed, CT can be found. Abdominal CT can observe the whole abdominal organs and can examine any organ in the abdominal cavity.