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首页> 外文会议>Conference on Image-Guided Procedures, Robotic Interventions, and Modeling >Phantom-based evaluation method for surgical assistance devices in minimally invasive cochlear implantation
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Phantom-based evaluation method for surgical assistance devices in minimally invasive cochlear implantation

机译：基于幻影的微创人工耳蜗手术辅助装置评估方法

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摘要

Several research groups have proposed individual solutions for surgical assistance devices to perform minimally invasive cochlear implantation. The main challenge is the drilling of a small bore hole from the surface of the skull to the inner ear at submillimetric accuracy. Each group tested the accuracy of their device in their respective test bench or in a small number of temporal bone specimens. This complicates the comparison of the different approaches. Thus, a simple and inexpensive phantom based evaluation method is proposed which resembles clinical conditions. The method is based on half-skull phantoms made of bone-substitute material - optionally equipped with an artificial skin replica to include skin incision within the evaluation procedure. Anatomical structures of the temporal bone derived from segmentations using clinical imaging data are registered into a computer tomographic scan of the skull phantom and used for the planning of the drill trajectory. Drilling is performed with the respective device under conditions close to the intraoperative setting. Evaluation of accuracy can either be performed through postoperative imaging or by means of added targets on the inside of the skull model. Two different targets are proposed: simple reference marks only for measuring the accuracy of the device and a target containing a scala tympani model for evaluation of the complete workflow including the insertion of the electrode carrier. Experiments using the presented method take place under reproducible conditions thus allowing the comparison of the different approaches. In addition, artificial phantoms are easier to obtain and handle than human specimens.
机译：几个研究小组已经提出了用于外科手术辅助设备的个体解决方案，以进行微创人工耳蜗植入。主要挑战是要以亚毫米级的精度在头骨表面到内耳钻一个小孔。每个小组都在各自的测试台或少量颞骨样本中测试其设备的准确性。这使不同方法的比较变得复杂。因此，提出了一种简单且廉价的基于幻像的评估方法，该方法类似于临床情况。该方法基于由骨骼替代材料制成的半颅骨幻影-可选配以人造皮肤复制品，以在评估程序中包括皮肤切口。使用临床成像数据从分割获得的颞骨的解剖结构被记录到颅骨体模的计算机断层扫描中，并用于规划钻探轨迹。在接近术中设置的条件下使用相应的设备进行钻孔。准确性的评估可以通过术后成像或通过颅骨模型内部的附加目标来执行。提出了两个不同的目标：仅用于测量设备准确性的简单参考标记，以及一个用于评估整个工作流程（包括插入电极载体）的标本类型的标靶。使用提出的方法进行的实验是在可重现的条件下进行的，因此可以比较不同的方法。另外，人造体模比人类标本更容易获得和处理。

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