目的 探讨磁共振血管成像对 椎-基底动脉压迫引起的三叉神经痛中的 应用。方法 回顾性分析临床诊断三叉神 经痛20例，磁共振诊断椎-基底动脉压迫 三叉神经，利用多序列原始数据进行冠 矢状位重建，进行多方位观察椎-基底动 脉与三叉神经之间的关系。结果 MRI诊 断20例责任血管为椎-基底动脉压迫三叉 神经痛；MVD术中均发现责任血管为椎基底动脉，其中右侧椎动脉4例，左侧椎 动脉8例，未见双侧同时受压表现。基 底动脉6例，基底动脉异常分支2例其中 18例患者椎-基底动脉均有扩张>4mm， 平均(4.9±3)mm，椎-基底动脉颅内段长 (29.5±3)mm其中5例合并有颅内腔隙性 缺血性改变。结论 磁共振技术在显示良 好的三叉神经的解剖形态和清晰的显示 椎-基底动脉走形及形态变化中有着显著 的优势，能显著提高椎-基底动脉压迫三 叉神经的检出率，对临床手术的选择有 重要的指导意义。

Objective To investigate the application of magnetic resonance angiography (MRI) in trigeminal neuralgia caused by vertebral-basilar artery compression. Methods Twenty cases of trigeminal neuralgia were diagnosed by MRI. MRI was utilized to diagnose the trigeminal nerve compression of the vertebral - basilar artery. Coronal sagittal reconstruction was performed by multiple sequence primal data, and the relationship between vertebral - basilar artery and the trigeminal nerve was observed. Relationship. Results The MRI diagnosis of 20 cases of vertebral - basilar artery compression of the trigeminal neuralgia. MVD surgery were found in the vertebral - basilar artery blood vessels, including the right vertebral artery in 4 cases, 8 cases of left vertebral artery, no bilateral Compression performance. Basilar artery in 6 cases, 2 cases of basilar artery abnormal branch of which 18 patients with vertebral - basilar artery were expanded> 4mm, an average of (4.9±3)mm, vertebral - basilar artery intracranial length (29.5±3) mm 5 cases with intracranial Lacunar ischemic changes. Conclusion Magnetic resonance imaging (MRI) is under a significant advantage in showing the anatomical morphology of the trigeminal nerve and clearly showing the change of the vertebral- basilar artery. It can greatly improve the detection rate of the spinal cord compression of the trigeminal nerve. The choice has the essential guidance significance.