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

在人工耳蜗植入手术中，电极位置的确定一直是个难题。本研究利用三维CT图像，在工作站上对人尸体颞骨或耳蜗的显示进行了研究。此外，我们尝试使用仿真内窥镜技术显示耳蜗的膜迷路。为了识别标记物的三维位置，我们利用Boltzmann渲染技术开发了真实的实时演示软件。目前，我们正在研究人工耳蜗电极作为参考标记的识别。最后，我们尝试了人工耳蜗电极植入术。电极通过由澳大利亚的Coquarar有限公司的coutecy涂覆植入电极的表面来布置。此外，我们还开发了用于插入耳蜗基底回的精细探针。在导航系统的引导下，通过该精细探针和电极的组合，能够识别电极的尖端。然而，此时它无法跟随耳蜗第二圈中的电极。未来的研究需要开发新的软件来识别电极作为参考标记，虚拟配准电极头端或任何电极的aprt，以及使用电磁引导系统。

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.