摘要
目的:评价磁共振成像对恶性梗阻性黄疸的诊断价值。方法:30例临床怀疑恶性梗阻性黄疸的患者术前行MRI检查。扫描序列包括快速自旋回波(TSE)T1WI、T2WI、压脂后增强扫描、TSE-MRCP和真稳态快速进动成像(TrueFISP)。所得结果与手术及病理所见进行对照。结果:各MRI序列均能准确判断胆管内径、梗阻的部位及程度,其中以MRCP最为快捷方便。术前结合各序列总诊断符合率为86.7%(26/30)。胰头癌在T1WI增强扫描及T2WI平扫上的肿块显示率(均为83.3%)及受侵血管显示率(均为81.3%)高于其它序列。胆管肿瘤在各序列上均能显示,但TrueFISP序列、T1WI增强扫描能较好地显示肿块累及范围。结论:MRCP对评价胆管内径、梗阻的部位及程度优于其它序列,T1WI增强扫描及T2WI平扫能较好显示胰头癌的大小及累及范围,TrueFISP序列和T1WI增强扫描能较好显示胆管肿瘤的大小及累及范围。
Objective：To evaluate the role of several MR sequences in diagnosing and assessing malignant obstructive jaundice. Methods： 30 patients with suspected malignant obstructive jaundice were performed MR examination （Siemens 1.5T Sonata）. Frequency sequences included TSE-T1WI, TSE- T2WI, TSE SPIR-T1WI with Gadolinium administration, TSE MRCP,True FISP. All the findings were compared with the results of operation and pathology. Results： MRCP is the best way to evaluate the site and degree of obstruction. The accuracy with all the sequences in diagnosis of obstructive jaundice is 86.7%. Both ratio of the T2WI and T1WI （with contrast） in displaying the carcinoma of head of pancreas were 83.3%, and that of displaying invaded vessels were 81.3% , which were higer than other sequences. Cholangiocarcinoma was more clear on True FISP and T1 WI with contrast enhancement. Conclusion： MRCP is best in evaluating the locus and degree of obstruction. T2WI and T1 WI with contrast enhancement are good at eval.uating the carcinoma of head of pancreas. True FISP and rl WI with contrast enhancement are good at evaluating cholangiocarcinoma.
出处
《放射学实践》
2005年第9期782-786,共5页
Radiologic Practice
关键词
磁共振成像
胆管阻塞
肝外
胰腺
Magnetic resonance imaging
Bile duct obstruction,extrahepatic
Pancreas
