胆管癌的MRI与MRCP诊断

目的探讨磁共振成像(MR I)及磁共振胰胆管成像(MRCP)对胆管癌的诊断价值。方法对27例有完整临床资料的胆管癌病例行常规MR I平扫,病变部薄层扫描,及三期轴位动态增强扫描,并用2种不同方法行磁共振胰胆管成像(MRCP):①HT2-FSE不屏气二维多平面薄层采集;②单次激发快速自旋回波技术(SSFSE)单平面厚层采集。结果几种成像方法对病变局部的显示率分别为T1W I 52%(14/27)、T2W I 70%(19/27)、局部薄层扫描85%(23/27)、增强扫描100%(27/27);定位诊断率:HT2-FSE二维多平面薄层采集为100%(27/27),SSFSE单平面厚层采集为89%(24/27)。结论胆道薄层扫描及动态增强扫描对恶性胆道肿瘤的定位及定性诊断有较大的帮助,MRCP可无创显示胆道形态,有助于诊断。

MRI and MRCP Diagnosis of Bile Duct Cancer

Objective To investigate the diagnostic value of MRI and MRCP in bile duct cancer.Methods 27 cases of bile ductcancers with complete clinical data were examined with MRI(including conventional MRI,thin slice scan and three phase axial dynamicenhanced scan) and MRCP(including non-breath-holding 2D multi-thin-slice with HT_2-FSE sequence and single thick sliceacquisition with single short fast-spin-echo sequence).Results The ratio of imaging methods in showing lesions was as follows,52% on T_1WI,70% on T_2WI,85% on thin slice scan and 100% on enhanced scan.The localized ratio of lesions by MRCP was 100% on 2Dmulti-thin-slice and 89% on SSFSE.Conclusion Thin slice scan and dynamic enhanced scan are helpful in the localized andqualitative diagnosis of bile duct cancer.MRCP can display the bile duct morphology noninvasively.