Fumitoshi Aga, Mitsuru Matsuki, Shuji Kanazawa, Hiroyuki Kani, Syushi Yoshikawa, Isamu Narabayashi, Daisuke Masuda1）, Toshihiro Inoue1）, Yoshifumi Arisaka1）,
Mitsuhiko Iwamoto2）, Yoshiharu Miyamoto2）, Kyoichi Takaori2）, Nobuhiko Tanigawa2）

Department of Radiology, 2nd Department of Internal Medicine1）,
Department of General and Gastroenterological Surgery2）, Osaka Medical College

　We examined four children with pancreaticobiliary maljunction in whom curved planar reformation（CPR）obtained by multidetector row CT（MDCT）was useful in evaluating the confluence of the common bile duct and main pancreatic duct（MPD）. Magnetic resonance cholangiopancreato-graphy（MRCP）was performed in all patients, but it could not demonstrate the confluence. Contrast-enhanced CT at the pancreatic parenchymal phase was performed using 4DAS MDCT, and CPR was obtained using multiplanar reformation software by tracing the MPD. The CPR clearly showed the confluence, even in those patients who could not perform a respiratory stop during the contrast-enhanced CT examination. These CPR findings corresponded to the endoscopic cholangio-pancreatography（ERCP）or intraoperative cholangiography. We consider that CPR using MDCT can be useful also in the diagnosis of pancreaticobiliary maljunction with unclear biliary dilatation, which is difficult to evaluate by ultrasonography, axial CT images, or MRCP.

Keywords：Pancreaticobiliary maljunction, Multidetector row CT (MDCT), Curved planar reformation (CPR)