Value of MSCT and image post-processing techniques in diagnosis of gallstone ileus

Objective To explore the value of MSCT and image post-processing techniques in diagnosis of gallstone ileus.Methods Fifteen patients with gallstone ileus confirmed surgically or clinically were retrospectively reviewed.All patients underwent abdominal plain and contrast enhanced MSCT scan.Volume data were reconstructed with MPR,slab thin slice maximum intensity projection(STS-MIP) and CPR.MSCT findings were compared with surgical results.Results Intestinal obstruction were detected in all 15patients,with pneumobilia in 13,pneumo-gallbladder in 6,and intestinal ischemia in 4cases.There were 5patients showing biliary-enteric fistula definitely in enhanced MSCT scan.Totally 20ectopic stones were found,15located in the ileum and 5in the jejunum.Multiple stones occurred in 3patients.Post-processing image of MSCT clearly displayed the size,the number and the location of ectopic stones,as well as the obstructive site and surrounding complication,which were identical to surgical results.Conclusion MSCT and image post-processing techniques have an important clinical value in diagnosis of gallstone ileus and can provide rich and comprehensive information for clinical therapy.