Research On Simulation Of Haptic And Deformation Model On Lung In Video-Assisted Thoracic Surgery

With the development of virtual reality technology increasingly,the application of virtual reality in medicine has also been gradually developed,which promotes the development of modern medicine to the frontier technology of precision,personalization and minimally invasive.It is also an effective technical means to improve the level of medical teaching,medical research and clinical diagnosis and treatment.Soft tissue deformation in virtual surgery needs to meet the requirements of visual fidelity,physical fidelity and real-time interaction at the same time,which is a difficult technical problem in virtual surgery technology and system research.In this paper,the research background is the minimally invasive surgery of thoracic surgery.The system mainly studies the soft tissue deformation algorithm based on position dynamics model.The main achieved results include:1.Analyzing the mathematical principle and constraint conditions of the traditional position dynamics model,the constraints are mainly commposed of stretch,volume,bend constraints;Introducing the method of physical model drivened soft tissue deformed.Generating the method of geometric model and physical model coupling.Finally,according to the characteristics of extension of position based on dynamic,it is applied to virtual surgery and shown the effect of deformation.2.Designing and implementing the tactile rendering of the feedback device in the surgical simulation system.In this paper,I used the force feedback device to control the surgical instruments,and then I added a tactile programming to the clip,the pressure,and the method that we use for the collision detection algorithm(AABB),to enhance the simulation,and the algorithm has been integrated into the thoracoscopic virtual surgical simulator,and has achieved the core function of the virtual surgery,which has the force feedback.3.It introduce that construction of the thoracoscope operation platform and gives the background description and the technique involved in the related model.The system consists of two parts: soft and hard.It shows the components of the hardware platform.The software part is composed of OpenGL library,GLUT library,haptic library,etc.The way of generating the system model include Force feedback model,soft tissue deformation model and collision detection model,introduced data structure used in this paper.