MRI对急性主动脉夹层的诊断价值.doc

文档介绍：MRI对急性主动脉夹层的诊断价值
(作者:___________单位: ___________邮编: ___________)
作者:周仪张蔚蔚符益纲沈祥春
【摘要】目的探讨急性主动脉夹层的MRI表现及诊断价值。方法采用超导型MR 扫描机对31例主动脉夹层作不同序列技术的MR成像检查,介绍一种快速平衡稳态进动序列成像检查。结果主动脉夹层诊断准确率100%,磁共振表现为(1)不同信号双腔影;(2)剥离的内膜瓣;(3)破裂口;(4)血栓性主动脉夹层。结论磁共振成像对主动脉夹层的确诊具有重要价值。早期诊断、治疗是降低死亡率的关键。
【关键词】急性; 主动脉夹层; 磁共振成像
[Abstract] Objective To investigate MRI findings and diagnostic value of aortic dissection. Methods 31 patients with acute aortic dissection were examined using ic Resonance Imaging by applicaion of different pluse sequence techniques at Technicare TandGE Signa Excite Twinspeed. A Fast Imaging Employing Steady State Acquisition,(FIESTA)pulse sequence was introduced at Signa Excite Twinspeed. Results The accuracy of MRI diagnosis rate was 100%. The MRI could demonstrate features included:(1)Double lumen with different attenuation values; (2)intimal flapserating the two chambers; (3)rupture of the bloodvessel; (4)thrombosed dissecting. Conclusion MRI is valuable for the diagnosis of acute aortic diagnosis and treatment may be key to reduce the mortality rate.
[Key words] acute; aortic dissecting;MRI
主动脉夹层(aortic dissection,AD)又称主动脉夹层瘤。是因主动脉内膜破损,高压血流冲入血管壁,造成内膜、中层撕裂而形成夹层血肿并沿主动脉管壁长轴分离延伸的严重心血管疾病。临床上主动脉夹层并不少见,是一种严重威胁人类健康的较常见的主动脉的致命性疾病。本文报告31例急性主动脉夹层MRI检查结果,分析讨论有关诊断问题。
资料与方法
搜集1995年5月~2007 年5月临床拟诊AD 31例,男性24例,女性7例,年龄37~74岁,。发病时间8~72小时入院。临床表现以胸痛为主(100%