VTK在可视人体头部三维重建中的应用

Application of VTK in three dimensional reconstruction of visible human's head

为了更好地辅助医生进行脑部疾病诊断、手术规划和治疗中的监控,基于美国可视人项目提供的CT序列图像,利用VTK(visualization Toolkit可视化工具箱)实现了人体头部皮肤及骨骼的三维重建:1)基于Matlab编程读取dicom格式的医学图像,采用最大类间方差阈值法进行头部皮肤与骨骼的图像分割,将所得的两个分割阈值分别作为皮肤和骨骼等值面的抽取值。2)在VC++中利用VTK编程实现了可视人体头部的表面重建。实验结果表明,本方法获得了理想的三维重建效果,编程简单迅速,且程序运行时间仅为8.4 s。

To better assist surgeons to implement disease diagnosis, operation planning and monitoring in treatment of the brain, the 3D reconstruction of head skin and bones based on CT image sequences provided by visible human project of America using VTK （visualization Toolkit） is realized： 1） By Matlab programming, the medical image in dicom format are read, the skin image and bones image of head are segmented using maximum between-class variance threshold algorithm, and the two segmented thresholds are used as the isosurface extraction values of skin and bone, respectively. 2） The surface rendering of visible human’s head is realized by VTK programmed with VC＋＋. The result of experiment shows that this method obtained desired effect of 3D reconstruction, programming quick and simple, and the running time of the program is only 8.4s.