3.0T MRI仿真内窥镜重建技术在面肌痉挛中的应用研究

目的探讨3.0 T MR仿真内窥镜重建技术在面肌痉挛中的应用研究。材料与方法对30例面肌痉挛患者采用横断面3D FIESTA C扫描,将原始图像在后处理工作站进行仿真内窥镜重建（megnatic resonance virtual ebdoscopy,MRVE）,分析症状侧血管与神经的关系。30例中22例接受微血管减压手术治疗（microvacular decompression,MVD）。结果 30例症状侧血管与神经接触者6例,压迫者24例；24例接触或压迫部位发生于面神经出脑干段根部,6例发生于面神经远脑干端；责任血管为小脑后下动脉11例,小脑前下动脉10例,椎动脉6例,基底动脉3例；22例MRI显示责任血管与术后吻合,术后面肌痉挛症状消失。结论 3.0 T MR仿真内窥镜重建技术在面肌痉挛中具有较高的临床应用研究价值,为明确病因诊断及手术计划制定提供重要依据。

Research of 3.0 T MRI virtual endoscopy reconstruction in hemifacial spasm

Objective：To explore the value of 3.0 T MRI virtual endoscopy recon-struction in mimetic convulsion. Materials and Methods： Thirty patients with mimetic convulsion received MR scan using FIESTA C sequence. The images were postprocessed with virtual endoscopy reconstruction on workstation. Relationship between vessels and nerves was analyzed in symptomatic side. Twenty two of 30 patients received microvascular decompression. Results：In symptomatic side of 30 patients, contact of vessels and nerves was found in 6 patients, and depression was found in 24 patients. Twenty four contact or depressions occurred in facial root emerging zone and six in nervi facialis distal to brainstem. Offending vessels included 11 anterior inferior cerebellar artery, 10 posterior inferior cerebellar artery, 6 arteriae vertebralis, and 3 arteriae basilaris. MRI showed the same offending vessels operative results, and the symptoms of mimetic convulsion disappeared after operation. Conclusions：3.0 T MRI virtual endoscopy reconstruction has high clinical application value in hemifacial spasm, and plays an important role in etiological diagnosis and operation planning.