The research for image-guided cochlear implant surgery with navigation system

在人工耳蜗术中，电极位置的确定一直是一个难题。在本研究中，我们利用3D-CT图像在工作站上对人身体颞骨或耳蜗内的耳蜗骨进行了显示。此外，我们还尝试使用虚拟内窥镜技术来显示耳蜗膜迷路。为了识别标记物的三维位置，我们利用团块渲染技术开发了实时演示软件。目前，我们正在研究人工耳蜗电极作为参考标记物的识别方法。最后，我们尝试了人工电极植入耳蜗术。电极由澳大利亚Cochlear Co.Ltd.公司在种植电极表面涂覆而成。此外，我们还研制了一种可插入耳蜗底回部的精细探头。在导航系统的引导下，将这种精细的探头与电极相结合，已经能够识别出电极的尖端。然而，此时它不能跟随耳蜗第二圈的电极。未来的研究还需要开发新的软件，用于识别电极作为折光标记，电极尖端或任何APRT的虚拟配准，以及使用的电磁引导系统。

It has been difficult to identify the location of electrode in the cochlear implant surgery. In the present study, we investigated the demonstration of the cochlea in human cadaver temporal bone or volantia by using the 3D-CT images, and monitored on the workstation. Furthermore, we attempted to use the technique of virtual endoscopy for demonstrating the menbranous labyrinth of the cochlea. In order to identify the 3d-site of marker, we developed the soft for real time demonstration by the tecnique of bolume rendering. Now, we are studying the identification of cochlear implant electrode as a referencial marker. Finally, we attempted the implantation by using artifial electrode to the cochlear. The electrode was arranged by coating the surface of implant electrode by the coutecy of the Cochlear Co.Ltd, Austraria. And also, we developed the fine probe for insertion into the basal turn of the cochlea. It has been able to identify the tip of electrode by the combination of this fine probe and electrode under the guidance of navigation system. However, it could not follow the electrode in the second turn of the cochlea at this time. The future study is needed to develop the new softwear for identifying the electrode as a refarence marker, the virtual registration of the tip or any aprt of electrode, and electromagnetic guidance system for use.