Application And Research Of Ascites Diagnosis System Based On Virtual Reality

Percussion and laparotomy require proficiency in surgical procedures to reduce the risk of patient injury due to malpractice,which requires extensive clinical practice.Virtual surgery is a solution to the problems of lack of surgical proficiency and high cost of surgical materials that cannot be used repeatedly in traditional medical surgical training.Virtual surgery is a computer simulation of a virtual mannequin and surgical environment,and the use of virtual reality interactive equipment to achieve interaction,realistic simulation of the entire process of clinical surgery.Compared with traditional surgical training,virtual surgery has the advantages of non-invasiveness and repeatability,but also has the problems of high system performance consumption and poor interactivity.For this reason,this paper uses virtual reality technology to simulate the virtual percussion of peritoneal fluid and virtual puncture of the peritoneal cavity in the process of surgery,using the rendering of peritoneal fluid,and realizing the human-computer interaction of data gloves through collision detection methods to achieve the function of being able to perform percussion and puncture of the peritoneal cavity in the virtual scene,which achieves the purpose of improving the proficiency of medical students in surgical operations and saving the cost of surgical training.The main results include the following.The main results of this paper include the following:First of all,for the traditional virtual surgery system performance consumption and poor interactivity,based on the analysis of commonly used collision detection methods and comparison of their performance consumption,a combined collision detection method based on the basic collision body is proposed,adding appropriate collision bodies for different collision objects through the specific situation,and minimizing the use of grid collision bodies for complex objects for collision detection to achieve the purpose of reducing system performance consumption,and improving the interaction effect of the virtual surgery system based on the HTC VIVE virtual reality headset and VRTRIX data gloves and other devices to achieve interaction.Secondly,to address the problems of poor simulation of pneumoperitoneum and high performance consumption,we analyze and compare three common ways to simulate pneumoperitoneum,select the rendering method and simulate pneumoperitoneum by connecting function nodes in Shader Graph,and realize the effect of dynamic adjustment of pneumoperitoneum with the change of lying posture of the virtual human model through trigonometric functions in the code,so that the simulated pneumoperitoneum is more realistic and the performance consumption is lower.Finally,this paper adopts the optimized peritoneal fluid simulation method and the combined collision detection method to design and develop the peritoneal fluid diagnosis system through the Unity3 D virtual reality development engine,which realizes the virtual percussion and virtual peritoneal puncture surgery that can be performed immersively in the virtual scene,solving the problems that the traditional percussion cannot be repeatedly trained for patients with peritoneal fluid and the traditional peritoneal puncture surgery training without realistic surgical effects.