网络环境下人体器官的三维重建及变形仿真

背景:利用何种模型何种算法对不同器官组织进行变形仿真,既可保证逼真性又可兼顾实时性,目前的设计都是在单机系统上实现。目的:为了实现基于网络的人体器官的变形仿真及交互,设计以人体器官肾脏为例,利用CT图像,在VRML平台上实现器官模型的三维重建。方法:利用质点弹簧模型建立肾脏的物理模型,实现变形计算。最后通过VRML外部编程接口EAI和Java-Applet进行通信,实现器官模型在任意位置、任意外力作用下的变形模拟。结果与结论:在CT图像的基础上实现了人体器官肾脏的三维重建,并利用质点弹簧模型实现了人体器官肾脏的变形模拟。借助于JAVA和VRML的结合,实现了网络环境下肾脏的变形仿真,用户只需在网页界面中输入作用力的大小和作用位置点的序列,即可得到肾脏变形情况的场景。研究虽仅以简单的拉伸和挤压变形为例,其他变形亦可通过类似的方法实现。实验为人体器官的变形和虚拟手术系统的网络交互功能的实现提供了一种思路。

Three-dimensional reconstruction and deformation simulation of human organ based on web

BACKGROUND:It uses computer image processing technology and data visualization technology to reconstruct the human organ with selected mathematical model.OBJECTIVE:To simulate the three-dimensional model of focus full of the physical properties of actual object on screen using CT based on human organ deformation and simulation and interaction.METHODS:Image processing technology was used to process the CT of kidney and the date points of kidney contour were extracted.Through the communication between EAI (External Authoring Interface) of VRML and Java-Applet,the simulation of kidney can be achieved deformed under any external force at any position.RESULTS AND CONCLUSION:Three-dimensional reconstruction of human kidney was realized based on CT image,and deformation simulation was realized using mass-spring model.Using JAVA and VRML,the kidney was simulated,and the deformation condition was displayed after inputting sequence of size and position of applied force.This study only investigated extension and extrusion,but other deformation can be also realized.This approach gives a new idea for realizing the interaction of virtual surgery system about human organ on web.