[Usefulness of helical DIC-CT in pancreaticobiliary maljunction].

[PURPOSE]: To determine the usefulness of helical CT during drip infusion cholangiography (DIC-CT in patients with pancreaticobiliary maljunction. [MATERIALS AND METHODS]: DIC-CT was performed in six patients with pancreaticobiliary maljunction. After drip infusion of 100 ml of Iotroxic acid meglumine, helical CT was performed. One mm or 1.5 mm interval images were reformatted from the raw data. Thereafter, multi-plannar reconstruction (MPR) images were obtained from the reformatted images. The reformatted images and the MPR images were reviewed. [RESULTS]: In all cases, the form of the union was visualized. In two patients, a contrast defect was shown in the common bile duct arising from the union of the pancreatic duct. The defects were considered due to pancreatic juice reflux into the common bile duct. In the other two patients, the contrast medium in the common bile ducts was regurgitated into the pancreatic duct. [CONCLUSION]: DIC-CT was very useful in the evaluation of pancreaticobiliary maljunction, because of its functional characteristics, high resolution and three-dimensional data.