基于Web的医学体数据可视化系统

Web-Based Medical Volume Visualization System

摘要: 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。

Abstract: 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 in-creased the speed of 3D reconstruction and meet the needs of real-time interaction.