1.Establish specific imaging signs of different type IO, raise the rate of early correctly diagnosis of severity type ileus such as volvulus,entocele, intussusception.
2.Results In the 21 cases,there were adhesion in 6 cases,volvulus in 1 case,neoplasm in 8 cases,external hernal in 1 case,fecalith in 1 case,intussusception in 2 cases and inflammation in 2 cases.