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目的:探讨建立CT扫描及三维重建技术观察人工耳蜗植入(CI)电极的方法,并比较不同CT扫描三维重建方法的耳蜗内植入电极的影像学特征及其临床应用价值。方法:6例CI患者全部作术后CT扫描并分别应用多层面重建的容积再现(VR)、平均密度投影(AIP)、表面遮盖显示技术(SSD)3种方法进行三维重建,观察人工耳蜗植入术后耳蜗内电极。结果:3种方法的三维重建图均可直观地显示电极形态、走行及其在耳蜗内植入的深度和植入电极与内耳的空间关系,并可清晰识别耳蜗内的电极数目。结论:CT扫描三维重建方法可直接观察植入电极的形态及位置,可准确判断电极在耳蜗内电极数目,有其独特的临床应用价值。
OBJECTIVE: To investigate the method of establishing cochlear implanted (CI) electrodes by CT scan and three-dimensional reconstruction, and to compare the imaging features and clinical application value of implanted cochlear implants with different three-dimensional reconstruction methods. Methods: Six patients with CI were all undergone postoperative CT scan and were reconstructed by three methods: volume rendering (VR), average density projection (AIP) and surface covered display (SSD) Intracochlear electrode. Results: The three-dimensional reconstructed images of the three methods all showed the morphology of the electrode, the depth of the implant and its depth of implantation in the cochlea and the spatial relationship between the implant electrode and the inner ear. The number of electrodes in the cochlea could be clearly identified. Conclusion: The three-dimensional reconstruction method of CT scanning can directly observe the morphology and position of the implanted electrode, and can accurately determine the number of electrodes in the cochlea, which has unique clinical application value.