基于VTK的数字肠道可视化和位置映射研究

Study on digital intestine visualization and position mapping based on VTK

目的建立表面重建三维数字肠道和肠道位置映射模型。方法利用第2套中国虚拟人数据集的彩色断面图像手动分割出肠道,再在VC++环境下借助可视化工具包VTK进行表面重建和肠道相对位置映射功能实现。结果系统的实现功能包括:①虚拟人体肠道的面绘制,其中实体颜色、透明度、背景颜色、网格删减系数、表面平滑次数和光线效果等参数可以设定,以达到不同的面绘制效果。②具有旋转、平移、缩放和正交视图等方便的交互式操作。③从三维空间坐标到肠道相对位置的映射。结论此系统可以独立运行,具有较强的可移植性和扩展性,可应用于肠道内的定位,教学和科学研究提供了一个辅助的演示系统。

Objective To build a 3D digital intestine by surface construction and the corresponding position mapping model. Methods The intestine images were segmentted manually using the second Chinese visible human data set （CVH2）. The functions were realized in VC＋ ＋ programming environment with the help of VTK. Results The parameters of surface rendering of the Virtual Human intestine such as actor color, transparency, background color, mesh decimate percentage, the number of surface smoothing and lighting could be adjusted to give the different visual, effects, and then the entity could be viewed conveniently. The interactive operation including rotation, translation, scaling and orthogonal views were to facilitate the intuitive observation, and the mapping between the 3D coordinate position and the relative position in the intestine was realized. Conclusion The 3D digital intestine system can run independently and exhibit strong migration and extension. It can be used for location in intestine, serving as an assistant demonstration platform for education as well as scientific research.