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目的 :探讨三叉神经痛患者三叉神经根处蛛网膜下腔的MRI定量评估对影像学诊断及外科治疗的意义。方法 :回顾性分析95例原发性三叉神经痛患者的影像学资料,测量三叉神经根入桥脑处蛛网膜下腔宽度,统计分析数据资料并拟定蛛网膜下腔狭窄的量化指标。结果:蛛网膜下腔宽度为3.22~11.22 mm,拟定出狭窄值为4.21 mm。查找样本有9例患者的蛛网膜下腔宽度小于此界定值。结论:术前对三叉神经痛患者的蛛网膜下腔进行定量评估,能提前发现蛛网膜下腔狭窄患者,对手术方案的制定具有重要意义,临床应用取得了良好结果。
Objective: To investigate the MRI quantitative evaluation of trigeminal nerve root in the trigeminal neuralgia for imaging diagnosis and surgical treatment. Methods: The imaging data of 95 patients with primary trigeminal neuralgia were retrospectively analyzed. The width of the subarachnoid space at the entrance to the bridge of the trigeminal nerve root was measured. Statistical data were analyzed and the quantitative indexes of subarachnoid stenosis were drawn. Results: The width of the subarachnoid space was 3.22 ~ 11.22 mm, and the stenosis value was 4.21 mm. Nine patients who looked for the sample had a subarachnoid width less than this limit. Conclusion: The quantitative evaluation of the subarachnoid space in patients with trigeminal neuralgia before surgery is helpful for the early detection of patients with subarachnoid space stenosis. It is of great significance for the development of surgical plans and has achieved good results in clinical application.