Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan.
Department of Advanced Medical Initiatives, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan.
Auris Nasus Larynx. 2020 Aug;47(4):574-579. doi: 10.1016/j.anl.2020.01.007. Epub 2020 Feb 7.
To develop a registration procedure to achieve a higher degree of registration accuracy in image-guided otological surgery, paying particular attention to the registration centroid.
A head phantom was used to measure the target registration error (TRE) at measurement points at various depth from the surface of the head. The surface-matching registration was performed using a commercially available surgical navigation system. We registered the phantom using only one ear of either side (right 100% - left 0%, or right 0% - left 100%) or using both ears with variable ratios (right 75% - left 25%, right 50% - left 50%, or right 25% - left 75%).
The overall TRE was the smallest when registration was performed equally on both sides. However, the TRE at 20-50 mm from the surface was the smallest when the fiducial points for the registration were collected asymmetrically at a ratio of 75:25 and weighed heavier on the operating side, and this difference was statistically significant.
The accuracy of image-guided surgery can be improved by carefully planning the registration procedure without changing the procedure itself. Accurate image-guided surgery at the middle and inner ear was achieved using 75% of the point cloud for the operating side and 25% of that for the opposite side for the registration.
开发一种注册程序，以提高图像引导耳科手术中的注册精度，特别关注注册质心。
使用头部模型在距头部表面不同深度的测量点测量靶标注册误差（TRE）。使用市售的手术导航系统进行表面匹配注册。我们仅使用任一侧的一只耳朵（右侧 100%-左侧 0%，或右侧 0%-左侧 100%）或使用双耳以不同比例（右侧 75%-左侧 25%、右侧 50%-左侧 50%或右侧 25%-左侧 75%）进行注册。
当两侧注册相等时，整体 TRE 最小。然而，当注册的基准点以 75:25 的比例不对称收集且在手术侧加权更重时，距表面 20-50 毫米处的 TRE 最小，这一差异具有统计学意义。
无需改变注册程序本身，通过仔细规划注册程序可以提高图像引导手术的准确性。使用手术侧的点云的 75%和对侧的 25%进行注册，可实现中耳和内耳的精确图像引导手术。
