Surface laser registration in ENT-surgery: accuracy in the paranasal sinuses--a cadaveric study.
Surface laser registration in ENT-surgery: accuracy in the paranasal sinuses--a cadaveric study.
复制标题
耳鼻喉手术中的表面激光配准：鼻旁窦的准确性——尸体研究。
作者：
G. Ledderose;K. Stelter;A. Leunig;H. Hagedorn
在过去的十年中，手术导航系统已广泛用于耳鼻喉科手术。导航精度在很大程度上取决于配准过程。本研究旨在评估使用导航系统VectorVisionCompact（BrainLab，Heimstetten，德国）进行表面激光配准后鼻窦和侧颅底的准确性。对两具尸体头部进行重复测量。在面骨、鼻旁窦和侧颅底中放置16个钛螺钉基准点，从而作为可准确识别的测量点。通过执行对称的双侧以及严格的单侧配准，评估了配准区域的定位和构造对测量精度的各自影响。对称双侧表面激光配准的总体准确度为1.13 +/- 0.53 mm，范围为0.77（额窦）至1.76（岩骨）mm，因此证明在临床上是足够的。靶点和配准区域之间的距离增加沿着准确度下降。导航准确性受到配准区域选择的显著影响。最好的准确性检测后对称的双边注册。
Over the past decade, surgical navigation systems have found widespread use in ENT-surgery. Navigational accuracy highly depends on the registration process. The objective of this study was to assess the accuracy in the paranasal sinuses and lateral skull base after surface laser registration using the navigation system VectorVisionCompact (BrainLab, Heimstetten, Germany). Repeated measurements were performed on two cadaver heads. Sixteen titanium screw fiducials per head were placed in facial bones, the paranasal sinuses and the lateral skull base, thereby serving as exactly identifiable measurement points. The respective influence on measurement accuracy depending on the localization and conformation of the registration area was evaluated by performing symmetrically bilateral as well as strictly unilateral registrations. The resulting overall accuracy for a symmetrically bilateral surface laser registration was 1.13 +/- 0.53 mm, ranging from 0.77 (sinus frontalis) to 1.76 (petrous bone) mm, and thus proved to be clinically sufficient. Increasing distance between target point and registration area went along with a decline in accuracy. Navigational accuracy was significantly influenced by the choice of the registration area. Best accuracy was detected after symmetrically bilateral registration.