Objective: To evaluate the diagnostic value of MRI in trigeminal neuralgia.Methods:Conventional MRI and 3D -TOFSPGR sequence were performed in 50 patients with trigeminal neuralgia.The bilateral trigeminal nerves were observed, and the distance from the trigeminal nerves to it’s surrounding vessels were measured.Results:Conventional MRI demonstrated that the positive rate was 60％ on the symptomatic side and 6％ on the unsymptomatic side respectively.3D-TOF-SPGR sequence demonstrated that the positive rate of vessels indentation was 84％ on the symptomatic side, while 8％ on the unsymptomatic side.Conclusions:MRI is of great value in diagnosis of trigeminal neuralgia.3D-TOF-SPGR sequence is superior to conventional MRI in showing microvessels.%目的:探讨MRI显示血管神经关系对三叉神经痛的诊断价值.方法:对50例三叉神经痛患者行常规MRI扫描和三维时间飞跃-扰相梯度回波(3D-TOF-SPGR)序列薄层扫描,观察双侧三叉神经周围是否存在血管影,并测定双侧三叉神经长轴与邻近血管的距离.结果:常规MRI扫描发现有三叉神经痛症状的一侧血管压迫神经阳性率60%,非疼痛侧阳性率6%;3D-TOF-SPGR序列扫描发现疼痛侧神经血管神经接触或受压变形阳性率84%,非疼痛侧阳性率8%.结论:MRI诊断三叉神经痛具有较高的临床价值.对微小血管的显示方面,3D-TOF-SPGR序列扫描优于常规MRI扫描.
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