目的 探讨MRI对大前庭导水管 综合征的诊断价值。方法 将2014-03至 2016-03我院确诊的26例大前庭导水管综 合征患儿纳入本研究，比较分析患者的高 分辨CT检查和MRI检查结果。结果 高分 辨CT图像可见不同程度扩大的前庭导水 管和不同形状的骨缺损影，VR重组后3D 图像中可见前庭导水管扩大；MRI图像可 见不同程度扩大的内淋巴囊和内淋巴管， 均呈高信号，VR重建后3D图像中可见内淋 巴囊扩大；两种方法对前庭导水管相关部 位测量结果对比，差异无统计学意义(P＞ 0.05)。结论 MRI和高分辨CT均可直观显 示前庭导水管扩大，高分辨CT更侧重于对 前庭导水管扩大骨性结构的显示，而MRI 则以内淋巴囊的扩大为主要显示结果，二 者对大前庭导水管综合征均有准确的诊断 效果

Objective To explore the diagnostic values for large vestibular aqueduct syndrome by MRI. Methods 26 cases of patients with children with large vestibular aqueduct syndrome were researched, the CT and MRI results were compared. Results High resolution computed tomography (CT) images is enlarged vestibular aqueduct different level and different shapes of bone defect in the shadow, VR 3D images after restructuring visible in vestibular aqueduct expand; MRI image visible expand different level within the lymph sac and lymphatic vessels, all show high signal, VR after restructuring lymph sac expand inside seen in 3D images. There has no significant difference on the results of vestibular aqueduct related ministries and measurement(P ＞0.05). Conclusion Magnetic resonance imaging (MRI) and high resolution CT can expand visual display vestibular aqueduct, vestibular aqueduct and high resolution CT is more focused on the expansion of osseous structure shows that while MRI within lymph sac expands as the main display results, both for large vestibular aqueduct syndrome have accurate diagnosis effect.