Research Of Guidewire Modeling And Simulation Of Interventional Surgery

With the continuous development of the economy and society,people's lifestyles have undergone tremendous changes.The incidence and death rates of cardiovascular and cerebrovascular diseases have been increasing year by year.They have become the nu mber one killer of harm to human health.There are many ways to deal with cardiovascular and cerebrovascular diseases.Vascular intervention surgery is the most effective method,so the study of vascular intervention surgery has become an important research topic.With the development of computer technology,the innovation of virtual simulation technology and virtual vascular intervention surgery training have become an effective method for training physicians,and they have great advantages of low cost,no damage,repeatability,and designability.The key point of the virtual vascular interventional surgery system is the modeling of the virtual interventional guide wire and the collision detection between the guide wire and the blood vessel.The current guide wire modeling methods are discrete,and the thin and long flexible guide wire is not proposed.Body modeling methods,so for the study of the guide wire modeling and collision detection methods have important clinical significance and practical value.For the existing problems,the main research contents of this paper include the following three points:First of all,a continuous guide wire model was proposed.The traditional virtual surgical intervention guide wire model method is a discrete model,the physical properties of the guide wire bending can not be fully embodied,this paper proposes a continuous wire model based on the torque relationship of the guide wire,the model can be a good simulation of the real guide wire Trends and forms,and through the comparison with the real guide wire,meet the accuracy and real-time requirements.Secondly,a "bar-shaped" collision detection method was proposed.For the collision detection of the guidewire in the virtual vascular interventional surgery system,a method for collision detection of thin and long flexible objects was proposed,and a “strip” collision detection method was added to the guidewire to better detect the virtual guidewire.Blood vessel surface collision detection.Thirdly,using the OSG to achieve a virtual intervention system simulation.By introducing the basic knowledge of the OSG platform and using the OSG platform,the simulation of the interventional procedure was realized,and the operation of pushing and pulling back the guide wire was realized,and a 3D printer was used to print out the blood vessel model of a real case,using the actual guide wire and blood vessel model were compared with the simulation system,and a similarity analysis was performed to verify the virtual interventional surgery system.