The abnormal cases clearly showed the occlusion the expansion of cholangiopancreatic duct, with and the diameters of expanded biliary duct and hepatic duct were greater than 1.0cm, with 100% sensitivity and 93.3% location accuracy .

• 异常组可清楚显示胆胰管梗阻扩张的形态 ；扩张肝管、胆管的直径大于 1 .；0cm；敏感性 1 0 0%25；定位准确性 93