Collision Detection Technology in Virtual Interventional Surgery

Collision detection of the devices and virtual organs is the key to haptic rendering in virtual interventional surgery. Based on the collision characteristics of interventional surgery system, the virtual guide wire is established by using elastic rod model, and then the guide wire dynamics algorithm based on the physical model was given. The difficulty of collision detection between guide wire and blood vessel is analyzed, and a fast collision detection algorithm based on AABB tree was proposed. The experimental results show that the guide wire model can meet the deformation behavior of the guide wire, and the collision detection algorithm is suitable for collision detection of the complex vascular models, which can ensure the real-time and fidelity of the virtual vascular interventional surgery system, thus enabling doctors' perception and interaction with virtual environment more accurate and real.