磁共振体层血管造影在面肌痉挛病因诊断中的价值

目的 评价磁共振体层血管造影成像技术（MRTA）在面肌痉挛病因研究中的价值，方法 面肌痉挛病人共121例，均行双侧面神经多平面成像MRTA检查，其中23侧面神经随后接受了面神经微血管减压术（MVD），结果 242侧受检面神经有面肌痉挛症状者123侧，其中MRTA检查显示面神经出脑干段（RFZ）有血管压迫者116侧，敏感性94．3％，无症状者119侧，其中MRTA检查显示REZ无血管压迫者112侧，特异性94．1％，23侧面神经接受MVD手术，有21侧术中所见与术前MRTA所示相吻合。结论 多平面成像MRTA检查方法有助于明确面肌痉挛的病因，对MVD的术前评估有重要意义。

Evaluation of magnetic resonance tomographic angiography in the diagnosis of hemifacial spasm

Objective To evaluate the imaging technique of magnetic resonance tomographic angiography (MRTA) in the investigation of etiology of hemifacial spasm (HFS). Methods Multiplane MRTA imaging of facial nerve of both sides was performed in all 121 HFS patients. Among them, 23 HFS patients received MVD subsequently. Results Among the 121 HFS patients, 119 patients had one side hemifacial spasm and 2 patients had double side hemifacial spasm,among them, neurovascular compression was found in the root entry zone (REZ) of facial nerve in 116 cases by MRTA,and the sensitivity was 94 3%;among the 119 cases which had no HFS,no neurovascular compression was found in the REZ of facial nerve in 112 cases by MRTA,and the specificity was 94 1%. Among 23 patients who received one side MVD, 21 patients had results that agreed with the multiplanar MRTA views. Conclusion Multiplanar MRTA was considered to be a very useful imaging technique for the study of etiology of HFS, and it also seemed to be a very important preoperative examination for MVD.