Three-dimensional localization of cochlear implant electrodes using epipolar stereophotogrammetry.
Three-dimensional localization of cochlear implant electrodes using epipolar stereophotogrammetry.
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使用极立体摄影测量法对人工耳蜗植入电极进行三维定位。
DOI：
10.1109/tbme.2004.826595
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Kim,NamH
中科院分区：
文献类型：
--
作者：
Yoo,SunK;Wang,Ge;Collison,Fred;Rubinstein,JayT;Vannier,MichaelW;Kim,HeeJ;Kim,NamH
单个耳蜗植入电极在内耳内的三维（3-D）定位对于耳蜗的电场建模、电极阵列的设计以及相关联的语音处理器的编程是重要的。提出了一种人工耳蜗电极的三维重建方法，结合螺旋CT技术，从两个X线视图定位单个电极。通过调整对极几何结构的X射线成像系统的配置，我们估计在最小二乘意义上的单个电极的位置，而不使用现有的立体摄影测量技术所需的患者附件。此外，我们的方法不需要任何知识的内部和外部参数的成像系统。我们的方法的性能进行了研究，在数值模拟和患者的数据，并被发现是足够准确的临床使用。数值模拟和患者数据的最大均方根误差分别为0.0445和0.214 mm。
Three-dimensional (3-D) localization of individual cochlear implant electrodes within the inner ear is of importance for modeling the electrical field of the cochlea, designing the electrode array, and programming the associated speech processor. A 3-D reconstruction method of cochlear implant electrodes is proposed to localize individual electrodes from two X-ray views in combination with the spiral computed tomography technique. By adapting epipolar geometry to the configuration of an X-ray imaging system, we estimate individual electrode locations in the least square sense without using a patient attachment required by an existing stereophotogrammetry technique. Furthermore, our method does not require any knowledge of the intrinsic and extrinsic parameters of the imaging system. The performance of our method is studied in numerical simulation and with patient data and is found to be sufficiently accurate for clinical use. The maximum root mean-square errors measured are 0.0445 and 0.214 mm for numerical simulation and patient data, respectively.