基于VTK的鼻咽部组织三维重建的应用研究

The Study of 3D Reconstruction of Nasopharyngeal Tissues Based on Visualization Toolkit

放射治疗是鼻咽癌治疗的主要手段.为了提高放射治疗的成功率,本文采用可视化工具包(VTK)分别实现了鼻咽部组织的表面重建和体重建.表面重建用移动立方体法和轮廓拼接法实现,体重建则用光线投射法实现.利用一种改进的高斯拉普拉斯核进行平滑和锐化处理,并通过调整光照参数和透明度值使重建效果达到最佳.在此基础上,比较了两种重建方法的优缺点.实验结果表明,利用VTK可实现复杂组织结构的多彩色三维重建和三维图像的优化处理.

Radiation therapy is the primary means of nasopharyngeal carcinoma （NPC） treatment. In the present work,in order to improve the success rate of radiotherapy we used the visualization toolkit （VTK） to achieve the surface and volume reconstruction of the nasopharyngeal tissues. The surface reconstruction was realized by marching cubes algorithm and contour connecting algorithm, and the volume reconstruction was implemented by ray-casting method. An improved Laplace and Gaussian nuclear was used for sharpening and smoothing. By adjusting the parameters of light and transparency, we achieved the best reconstruction effect. On this basis,the comparison was given on the advantages and disadvantages of the two methods of reconstruction. The results of experiment show that the VTK can be used to achieve multi-color 3D reconstruction of complex organizational structure and optimization of 3D image.