目的　探讨低张下薄层增强连续靶扫描对胆胰管十二指肠连接区癌的检查效果。方法　回顾分析 3 2例经手术病理证实的胆胰管十二指肠连接区癌的CT表现 ,其中胰头癌 15例、胆总管下端癌 12例、共同管或十二指肠乳头癌 5例 ,3 2例均经常规CT扫描 ,后行低张下病变局部薄层增强连续靶扫描 ,其中 2 2例CT扫描前口服碘造影剂 ,10例口服水。结果　采用低张法CT检查发现 :胰头区软组织肿块 2 9例、胆总管下端偏心性狭窄或有结节突起 16例、胆管扩张 15例、胰管扩张 9例、双管征 5例、十二指肠改变 12例、不强化或有轻度不规则强化 17例、明显强化 15例。采用常规法CT平扫检查发现以上征象分别是 :胰头区软组织肿块 10例、胆总管下端偏心性狭窄或有结节突起 9例、胆管扩张 13例、胰管扩张 4例、十二指肠改变 5例。结论　低张下CT薄层增强连续靶扫描是诊断胆胰管十二指肠连接区癌的可靠而有效的方法 ,以口服水代替含碘对比剂效果更好 Objective To investigate the effect of low-tension, thin-slice, continuous-target scanning on the cancer of the duodenal junction of the bile duct and pancreatic duct. Methods A retrospective analysis of 32 cases of pathologically confirmed gallbladder duodenal junction carcinoma of the CT findings, including 15 cases of pancreatic cancer, common bile duct cancer in 12 cases, common duct or duodenal papillary carcinoma in 5 cases , 32 cases were routine CT scan, followed by low-lying lesions of the local thin-layer enhanced continuous target scan, including 22 cases of CT scan before oral iodine contrast agent, 10 cases of oral water. Results Low-tension CT examination revealed 29 cases of soft tissue mass in the head of pancreas, 16 cases of eccentric stenosis at the lower end of common bile duct or nodular protrusion, 15 cases of bile duct dilatation, 9 cases of dilatation of pancreatic duct, 5 cases of double- In the 12 cases of duodenal changes, there were 17 cases with no enhancement or mild irregular enhancement and 15 cases with obvious enhancement. The conventional CT scan showed the above signs were: pancreatic head soft tissue mass in 10 cases, the lower common bile duct stenosis or nodular nodules in 9 cases, 13 cases of bile duct dilatation, pancreatic duct dilatation in 4 cases, duodenal Change in 5 cases. Conclusion Low-tension CT thin-layer enhanced continuous target scanning is a reliable and effective method for the diagnosis of duodenal junctional carcinoma of the bile duct and pancreatic duct, and oral water instead of iodine contrast agent is better