长巨脑动脉的MR综合成像

The Synthetic MR Imaging in Dolichoectasia of Cerebral Arteries

目的探讨长巨脑动脉MR多种成像方法的综合诊断价值。资料与方法对8例长巨脑动脉患者的MRI表现,磁共振血管成像(MRA)及多平面重组(MPR)、曲面重组(CPR)显示的异常血管分布、形态、信号强度进行分析。结果MRI能够明确显示椎-基底动脉的异常血管结构,以及相邻脑组织或颅神经的受压改变;MRA可直观显示迂曲延长、增粗的异常血管全貌;MPR则可以综合上述两种成像方法,同时显示异常血管的全貌以及相邻脑组织或颅神经的受压改变;CPR可将异常血管在同一平面展示,对显示迂曲血管最敏感。8例均发生在椎-基底动脉系统,其中2例累及基底动脉全段和左侧椎动脉,2例并发脑干梗死。结论MRI和MRA、MPR及CPR相结合,有助于该病的全面综合评价。

Objective To discuss the diagnostic value of synthetic MR imaging in dolichoectasia of cerebral arteries. Materials and Methods The MRI appearance and the abnormal distribution, morphology, signal intensity of the affected arteries on MRA or MPR and CPR of 8 cases with doliehoeetasia of cerebral arteries were analyzed. Results MRI could clearly demonstrate the abnormal arterial structures of vertebrobasilar artery, and the secondary compression of adjacent brain tissue and cranial nerves. MRA could visual display full view of the elongated, widened, and tortuous arteries. MPR could display the foregoing changes simultaneously. CPR could effectively display the abnormal arteries on one plane. The involved arteries were confined to the vertebral and/ or basilar arteries in 8 eases, 2 of them was confined to whole segment of the basilar artery and left vertebral artery, 2 of them was complicated with brain stem infarction. Conclusion The combination of MRI and MRA, MPR, CPR are helpful for synthetic assessing this disease.