电磁跟踪器在人体骨骼虚拟现实教学系统中的应用  

An Application of Flock of Birds in Virtual Practical Teaching System of Human Skeleton

作　　者：郝绚丽[1] 唐庆玉[1] 刘凯[1] 

机构地区：[1]清华大学电机系生物医学工程专业,北京100084

出　　处：《北京生物医学工程》2002年第3期215-217,237,共4页Beijing Biomedical Engineering

摘　　要：本文研究了将电磁跟踪器作为人机接口应用于该系统的方法。本教学系统中的骨骼模型是我们由美国国家医学图书馆 (NLM)可视化人体 (VHP)数据库中的女性人体CT图像三维重建出的。在本系统中 ,利用FlockofBirds能实时检测出电磁接收器相对于发射器的 6个自由度参数值的性质 ,通过将其接收器固定在操作者右手的食指上实现同步虚拟操作者手的动作 ,完成对屏幕上每块骨骼模型的抓取、移动和旋转 ,从各个方向观察每块骨骼模型 。Virtual practical Teaching System of Human Skeleton integrates virtual practical and medical education. It provides a more vivid learning environment to study the human skeleton. In this paper, the application of Flock of Birds (an electro magnetic tracking device) as man machine interface of this system is discussed. The skeleton models used in this system are 3 dimensional and reconstructed from a female's CT slices that come from the Visualized Human Project Database of NLM, USA. Flock of Birds can detect parameters of six dimensions in real time. The parameters represent characteristics of the electro magnetic receiver relative to the transmitter. In this system, we use Flock of Birds by attaching its receiver to the operator's index finger of the right hand. Then the operator can “grasp” every bone model on screen, move or rotate it to observe it from every direction so that virtual simulation of reality is implemented. Details of this method and its results are presented in this paper.

关 键 词：电磁跟踪器 虚拟现实 可视化人体 人体骨骼 虚拟现实教学系统 

分 类 号：R322.7[医药卫生—人体解剖和组织胚胎学]