磁共振血管成像对烟雾病诊断价值的探讨

目的:探讨MRA和MRI对烟雾病的诊断价值。方法:回顾性分析18例烟雾病MRA和DSA表现,18例中5例同时行DSA,采用2.0T超导高磁场MR扫描仪,MRA采用3D-TOF或3D-PC法。DSA采用GE Advantx心血管造影系统。结果:MRA显示狭窄或闭塞的血管,表现为多支、双侧受累。MRI平扫表现脑基底部狭窄、闭塞血管的流空效应减弱甚至消失,侧支循环血管形成所致的点状、条状迂曲低信号影。8例颅内可见血肿。结论:MRA作为一种无创伤的血管成像技术,能准确诊断moyamoya病可以与DSA媲美,结合MRI平扫可同时显示脑组织病变。

The evaluation of the diagnosis of moyamoya disease by MR Angiography

Objective:To evaluate the value of MRA and MRI in the diagnosis of moyamoya disease.Methods:18 patients examined by MRA and DSA were reviewed(5 patients examined by DSA) with Elscint 2.0T MR scanner and GE Advantx DSA system.Results:On MRA,multiple occluded or stenosed vessels can be well demonstrated.Hazy-like collateral network was showed in moyamoya disease.On MRI,it was showed that the signal intensity decreased in occluded or stenosed cranial basal vessels.The characteristic of collateral network showed that tortuous vessels from the suprasella cistern to the basal ganglia.8 patents showed hemorrhage.Conclusion:As a noninvasive vascular imaging method,MRA and MRI can well demonstrate various changes of moyamoya disease.It provides an accurate approach for the diagnosis of moyamoya disease.