面向上颌骨骨折复位手术的虚拟系统设计

基于3D计算机触觉视觉交互(CHAI3D)和开放图形库(Open GL)等开源软件,设计了针对上颌骨复位手术的仿真系统。使用真实病例的CT图像搭建虚拟场景,通过Geomagic力反馈设备对虚拟模型进行三维操作并输出触觉反馈。在原有单点碰撞算法的基础上,提出了使用多个中介代理的多点碰撞算法,避免了虚拟手术工具的手柄插入虚拟器官的不实仿真;通过力反馈设备对头颅骨模型进行选择、移动和旋转,模拟手术中对头颅骨的移动和放置。系统可用于训练医学院学生,也可用于复杂手术的术前规划。

Design of virtual surgery system in reduction of maxillary fracture

Based on open source softwares of Computer Haptics, visualizAtion and Interactive in 3D (CHAI 3D) and Open Graphic Library (OpenGL), a virtual surgical system was designed for reduction of maxillary fracture. The virtual simulation scenario was constructed with real patients' CT data. A geomagic force feedback device was used to manipulate the virtual 3D models and output haptic feedback. On the basis of the original single finger-proxy algorithm, a multi-proxy collision algorithm was proposed to solve the problem that the tools might stab into the virtual organs during the simulation. In the virtual surgical system, the operator could use the force feedback device to choose, move and rotate the virtual skull model to simulate the movement and placement in real operation. The proposed system can be used to train medical students and for preoperative planning of complicated surgeries.