基于Web的医学体数据可视化系统

Web-Based Medical Volume Visualization System

基于客户端的医学图像三维可视化系统仅能运行于指定的单一平台,限制了医学图像可视化系统的推广,提高了系统的使用门槛。本文基于WebGL技术,实现了一个无插件的医学图像可视化系统。体数据渲染常用的一种方法为光线投射算法,传统的光线投射算法需要进行大量的插值运算,三维重建速度较慢。本文通过对传统的光线投射算法进行改进,从选取采样点、插值运算、提前光线截止等方面进行改进,从而提高了三维重建的速度,基本满足实时交互的需要。

The client-based medical image 3D visualization system can only work on a specified platform, which limits the promotion of the medical image visualization system and raises the cost of using the system. Based on WebGL technology, we implement a plug-in-free medical image visualization system. The ray casting algorithm is one of volume rendering methods. But traditional ray casting algorithm requires a large number of interpolation operations, and the three-dimensional reconstruction speed is slow. We improve the traditional ray casting algorithm by selecting appropriate sampling points, optimizing the interpolation operation and early ray termination, which have increased the speed of 3D reconstruction and meet the needs of real-time interaction.