Figure 1.Typical appearance of abdominal CT showing the causes of acute abdomen in the present study. (A) duodenal perforation accompanied by free intraperitoneal gas; (B) gangrenous cholecystitis; (C) acute appendicitis; (D) bladder rupture; (E) intestinal obstruction caused by carcinomas in the rectosigmoid junction; (F) intestinal obstruction caused by inguinal incarcerated hernia.
