基于VTK的口腔种植手术导航系统的图像配准

Registration in Image Guided Oral Implantology System Based on VTK

讨论了口腔种植手术导航系统的关键技术——图像配准的实现全过程。制作了聚丙烯树脂模板专用配准装置,以基于外部标志点的无创配准方法,在基于VTK的平台环境下,开发了软件系统获取虚拟坐标系与世界坐标系下的基准点坐标,并以ICP算法完成配准。应用实例表明,配准误差小于1mm,可以满足口腔种植手术临床需要。

This paper introduces the key technology in the image guided oral implantology system （IGOIS）——registration. With the fabrication of tooth-supported polymer resin templates, a software system is developed to obtain the coordinates of fiducial points respectively under the virtual coordinate system（VCS） and the world coordinate system（WCS） by programming in VTK so that non-invasive point-to-point registration is realized through ICP algorithm. The result shows that the RMS error is less than 1mm, which can meet the clinical requirements of oral implantology.