基底动脉尖综合征的MRI影像学分析

摘要

Objective To explore the MRI features of top of the basilar artery syndrome (TOBS). Methods MRI and MRA (Magnetic Resonance Angiography) image data of 12 TOBS patients who had been clinically conifrmed were analyzed. Results The multiple lesions involving multiple brain regions were found in all 12 cases on MRI images. Except for the lesions of two cases found only on DWI, the lesions of the remaining 10 cases were slightly low signals on T1WI and slightly high signals on T2WI and FLAIR. All lesions of 12 cases showed high signals on DWI. The vascular morphology and signal changes of TOBS were displayed to different extent on MRA images. Conclusion TOBS had certain characteristics in MRI performance. Its main characteristics were the multiple lesions and the symmetrical involvement of the bilateral brain regions. Combined application of clinical manifestations and MRI can provide foundations for early diagnosis of TOBS.%目的：探讨基底动脉尖综合征（TOBS）的MRI特点。方法对12例经临床证实的TOBS患者进行MRI平扫及磁共振血管成像（MRA），分析其影像学表现。结果12例均为多发病灶，累及多个脑区。除2例超急性期患者T1WI、T2WI及FLAIR未见病变显示外，其余病灶的MRI平扫显示T1WI呈略低信号、T2WI及FLAIR呈略高信号、DWI呈高信号。12例患者的MRA均显示基底动脉尖部血管形态、信号有不同程度的改变。结论基底动脉尖综合征的MRI表现具有一定的特征性，其主要特点是供血区域多发病变、双侧脑区对称受累，MRI与临床资料相结合可为TOBS的早期诊断提供依据。