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目的探讨MR三维积极干预稳态梯度回波(3D-CISS)序列及内听道神经重建在人工耳蜗电极植入术前评估的价值。资料与方法对36例无任何耳部外在疾患的感音神经性耳聋预行人工耳蜗电极植入术的患者行脑部MR平扫及应用3D-CISS序列行双侧内听道区同时扫描,采用多平面重组(MPR)及最大强度投影(MIP)进行后处理,观察迷路腔结构完整性及内听道内各神经走行排列情况。结果MR 3D-CISS序列结合计算机后处理技术能较好地对迷路腔结构进行重建,较清楚显示结构异常及病变;应用MPR可以较清楚观察到行走于内听道的神经,并能了解其走行及缺失情况。结论利用MR 3D-CISS序列及后处理技术对内听道结构显示有独到之处,可为人工耳蜗电极植入术前适应证的评估提供一定帮助。
Objective To investigate the value of three-dimensional (3D) -positive interventional 3D steady-state gradient echo (3D-CISS) sequence and internal auditory canal reconstruction in preoperative cochlear electrode implantation. Materials and Methods MRI scan of brain in 36 patients with sensorineural deafness without any external ear disorder and cochlear implant implantation and simultaneous 3D-CISS scan with 3D-CISS sequence (MPR) and maximum intensity projection (MIP) were used to observe the structural integrity of the lost tract and the arrangement of the nerves within the auditory canal. Results MR 3D-CISS combined with computerized postprocessing technique could reconstruct the structure of the labyrinth cavity and make it clear that the structures were abnormal and the lesions were clear. By using MPR, we can clearly observe the nerves walking in the inner auditory canal and understand the movement And the lack of circumstances. Conclusion MR 3D-CISS sequence and postprocessing techniques are unique to the structure of the internal auditory canal, which may be helpful to evaluate the preoperative indications of cochlear implant.