Zeitler Daniel M, Wang Kevin H, Prasad Ravi S, Wang Edwin Y, Roland J Thomas
Department of Otolaryngolgy, University of Miami School of Medicine, Miami, FL, USA.
Cochlear Implants Int. 2011 Nov;12(4):216-22. doi: 10.1179/146701011X12962268235742.
To evaluate and compare image quality between flat-panel volumetric computed tomography (fpVCT) and multislice CT (msCT) in temporal bones with cochlear implants (CIs), and to evaluate fpVCT imaging for accuracy in determining CI electrode positioning.
Six cadaveric temporal bones were imaged prior to CI using fpVCT. Each bone was implanted with an electrode array and rescanned in order to create radial reformatted images through each electrode contact. Electrode-modiolar interval (EMI) distances were measured. The bones were fixed and cut in order to grossly evaluate for CI intrascalar positioning and insertional trauma.
To compare image quality between fpVCT and msCT in temporal bones with CI, and to evaluate the utility of fpVCT in post-implantation temporal bone analysis.
The mean EMI distances did not differ significantly between fpVCT and msCT images, while the image quality was significantly better for fpVCT. Furthermore, information about intracochlear trauma and intrascalar electrode array positioning can be ascertained using this radiographic technique.
fpVCT and msCT do not differ significantly in the evaluation of EMI distances in implanted temporal bones, but the image quality is significantly better using fpVCT. Additionally, useful information regarding intracochlear trauma, electrode depth of insertion, and intrascalar positioning can be gained from fpVCT imaging. Given the ease of use, superior image quality, improved convenience, reduced levels of radiation, and agreement with histology, fpVCT is a valuable option for post-implantation temporal bone imaging.
评估并比较平板容积计算机断层扫描（fpVCT）与多层螺旋CT（msCT）在植入人工耳蜗（CI）的颞骨中的图像质量，并评估fpVCT成像在确定CI电极位置方面的准确性。
在植入CI之前，使用fpVCT对6个尸体颞骨进行成像。每个颞骨植入一个电极阵列，然后重新扫描，以便通过每个电极触点创建径向重组图像。测量电极-蜗轴间距（EMI）。将颞骨固定并切开，以便大体评估CI在蜗管内的位置和插入创伤。
比较fpVCT与msCT在植入CI的颞骨中的图像质量，并评估fpVCT在植入后颞骨分析中的实用性。
fpVCT和msCT图像之间的平均EMI距离没有显著差异，而fpVCT的图像质量明显更好。此外，使用这种放射学技术可以确定有关蜗管内创伤和蜗管内电极阵列位置的信息。
在评估植入颞骨中的EMI距离方面，fpVCT和msCT没有显著差异，但使用fpVCT时图像质量明显更好。此外，从fpVCT成像中可以获得有关蜗管内创伤、电极插入深度和蜗管内位置的有用信息。鉴于其使用方便、图像质量优越、便利性提高、辐射水平降低以及与组织学结果一致，fpVCT是植入后颞骨成像的一个有价值的选择。
