一种半自动计算机辅助手术模板设计方法
A semi-automatic computer-aided method for surgical template design
摘要：
本文提出了一个通用的集成框架的半自动手术模板设计。实现了网格分割、等距面生成、碰撞检测、直纹面生成等算法，并开发了专用软件TemDesigner。通过简单的用户界面，可以根据术前计划半自动设计定制模板。该方法首先利用顶点带符号标量的网格分割方法，根据指示点环从输入曲面网格中分割出内曲面;然后，通过对内表面距离场进行轮廓化处理，得到内表面的等距面，并对等距面进行分割，生成外表面。直纹面用于连接内表面和外表面。最后，通过碰撞检测和合并，根据术前规划生成钻管。它已被应用于各种手术的模板设计，包括口腔种植，颈椎椎弓根螺钉插入，髂骶螺钉插入和截骨术，证明了我们的方法的效率，功能和通用性。
英文摘要：
This paper presents a generalized integrated framework of semi-automatic surgical template design. Several algorithms were implemented including the mesh segmentation, offset surface generation, collision detection, ruled surface generation, etc., and a special software named TemDesigner was developed. With a simple user interface, a customized template can be semi- automatically designed according to the preoperative plan. Firstly, mesh segmentation with signed scalar of vertex is utilized to partition the inner surface from the input surface mesh based on the indicated point loop. Then, the offset surface of the inner surface is obtained through contouring the distance field of the inner surface, and segmented to generate the outer surface. Ruled surface is employed to connect inner and outer surfaces. Finally, drilling tubes are generated according to the preoperative plan through collision detection and merging. It has been applied to the template design for various kinds of surgeries, including oral implantology, cervical pedicle screw insertion, iliosacral screw insertion and osteotomy, demonstrating the efficiency, functionality and generality of our method.
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