磁共振胰胆管成像与常规扫描诊断胆系结石的对照研究

目的：对比探讨磁共振胰胆管成像及其原始图像与磁共振常规扫描诊断胆系结石的价值。方法：应用1．0T超导MRI扫描仪对55例患者（36例胆囊结石和19例胆总管结石）行重T2加权多次激发FSE序列（HT2-FSE）磁共振胰胆管成像扫描及常规轴面FSE序列MRI T1WI及T2WI扫描。结果：磁共振胰胆管成像的最大强度投影图像能清晰显示肝内、外胆管及扩张胰管的形态结构。多数较大的胆系结石在磁共振胰胆管成像原始图像及MRI常规T2WI图像上可很好地显示，但常在最大强度投影图像被掩盖；较小的胆系结石在磁共振胰胆管成像的最大强度投影图像及MRI常规T2WI图像均难以准确显示，而仅在磁共振胰胆管成像原始图像上显示。结论：磁共振胰胆管成像原始图和最大强度投影图像以及磁共振常规扫描是分析、诊断胆系结石的一个有机整体，不能仅仅依靠某一种成像技术作出诊断。

Comparative study on MR cholangiopancreatography and original images and routine MRI in the diagnosis of biliary stones

Objective To evaluate the value of MR cholangiopancreatography and routine MRI in diagnosing biliary stones.Methods Fifty-five patients(36 cases of gallbladder stones and 19 cases of common bile duct stones) had undergone MR cholangiopancreatography with heavily T_2 weighted fast spin echo sequences and routine axial MRI T1WI and T_2WI with fastspin echo sequences.Results Maximum intensity projection images of MR cholangiopancreatography could definitely demonstrate the configuration of the bile duct and the enlarged pancreatic duct.Most bigger biliary stones could be well demonstrated on original images of MR cholangiopancreatography and routine MRI T_2WI images,but often be enshrouded on maximum intensity projection images.Whereas smaller biliary stones could not be demonstrated on maximum intensity projection and routine MRI T_2WI images,but only be demonstrated on original images of MR cholangiopancreatography.Conclusion MR cholangiopancreatography and original images and routine MRI is an organic body of diagnosing biliary stones.We should not rely on only one kind of them.