Lin Lang, Huang Yonghua, Zhang Weiwei
Department of Neurology, Beijing Military General Hospital, Beijing, China.
Neurol Res. 2008 May;30(4):341-3. doi: 10.1179/174313208X300305.
To determine the ischemic lesions distribution and extension of patients with basilar artery thrombosis by the means of magnetic resonance imaging (MRI).
In 17 patients with thrombosis of the basilar artery, MRI was performed, including T2-weighted, magnetic resonance angiography (MRA) and diffusion-weighted imaging (DWI) sequences in the short-term phase (<48 hours). The shapes of ischemic lesions were obtained by graphic software and overlapped on a representative layer outline background.
The MRA showed basilar artery occlusion in all cases and the DWI revealed different patterns of ischemic lesions. Most patients showed multiple lesions within the posterior circulation territory. Lesions more often occurred in pontes, cerebellums and mesencephalons than medullas, thalami and occipital lobes. Basilar pons, cerebral crus and cerebellum hemisphere were more susceptible than pontine tegmentum, vermis, midbrain tegmentum and tectum.
When the basilar artery is occluded, basilar pons, cerebral crus and cerebellum hemisphere were most susceptible. The branches with smaller lumen of basilar artery, which are easier to be affected, are thought to be the cause of such a phenomenon.
通过磁共振成像（MRI）确定基底动脉血栓形成患者的缺血性病变分布及范围。
对17例基底动脉血栓形成患者进行MRI检查，在短期（<48小时）内进行T2加权成像、磁共振血管造影（MRA）和弥散加权成像（DWI）序列检查。利用图形软件获取缺血性病变的形状，并将其叠加在代表性层面轮廓背景上。
MRA显示所有病例均有基底动脉闭塞，DWI显示出不同模式的缺血性病变。大多数患者在后循环区域内出现多处病变。病变更多发生在脑桥、小脑和中脑，而延髓、丘脑和枕叶较少见。基底脑桥、大脑脚和小脑半球比脑桥被盖部、蚓部、中脑被盖部和顶盖更易受累。
当基底动脉闭塞时，基底脑桥、大脑脚和小脑半球最易受累。基底动脉管腔较小的分支更容易受到影响，被认为是这种现象的原因。
