目的探讨薄层轴位T2WI脂肪抑制序列对壶腹周围病变的鉴别诊断价值。方法顺序收集临床资料完整的壶腹周围病变95例,均行上腹部MR检查,同时对感兴趣区行薄层扫描。结果MRCP结合常规MRI对壶腹周围病变的诊断准确率为75.79%。薄层扫描可显示约2.5mm小结石和10mm的肿块,增加薄层扫描后准确率为92.63%,增加薄层扫描前后准确率之间差异有统计学意义。结论在常规扫描的基础上增加感兴趣区薄层扫描有助于壶腹周围小病变的鉴别诊断。 Objective To investigate the differential diagnosis value of thin layer axial T2WI fat suppression sequence on the lesions around ampulla. Methods Ninety-five cases with complete ampulla of clinical data were collected in sequence. All patients underwent MR examination of the upper abdomen. At the same time, thin-layer scanning was performed on the region of interest. Results MRCP combined with conventional MRI diagnosis of ampullary lesions around the rate of 75.79%. Thin-layer scanning can show about 2.5mm small stones and 10mm lumps, increase the accuracy of the TLC scan was 92.63%, increase the accuracy of the difference between before and after thin-layer scanning was statistically significant. Conclusion Increasing the TLC scanning of the region of interest on the basis of routine scanning is helpful for the differential diagnosis of small lesions around the ampulla.