目的　探讨急性胰腺炎的产生与胰胆管合流部解剖的关系。　方法　回顾分析83例急性胰腺炎患者的MRCP片，对胰胆管合流部进行测量和分析比较；以同期139例非急性胰腺炎患者的MRCP片作为对比分析。　结果　急性胰腺炎组的共同通道长度明显大于对照组（P＜0.01）；前者胰管与胆管汇合处角度也明显大于后者（P＜0.01）；两组的肝外胆管直径和胰管直径无显著差别（P＞0.05）。　结论　急性胰腺炎的发生与胰胆管合流部的解剖密切相关，共同通道过长、胰胆管汇合角度过大是造成急性胰腺炎的重要因素。

Objective　To provide anatomic basis for the onset of acute pancreatitis by explore morphologic features of pancreaticobiliary junction.　Methods　MR cholangiopancreatography (MRCP) of 83 patients with acute pancreatitis (acute pancreatitis group, AP group) were analyzed retrospectively, and their pancreaticobiliary junctions were measured and compared. PRCP of other 139 patients with non-acute pancreatitis was analyzed in the same way as control (control group).　Results　For acute pancreatitis group, the length of common channel was significantly longer than that in control group (P＜0.01), and the angle between common bile duct(CBD) and pancreatic duct in the former was significantly larger than that of the latter (P＜0.01). However, there was no significant difference between the diameters of common bile duct or pancreatic duct in two groups (P＞0.05).　Conclusions　Pancreaticobiliay junction plays a significant role at the onset of acute pancreatitis，meanwhile，long common channel and large angle of pancreaticobiliay ducts are important factors causing acute pancreatitis.