Virtual Surgery System For Abdominal Organs Based On VR Helmet

Virtual reality is a brand-new technology that enables people to be physically present in a virtual world and interact with the virtual world.With the continuous development of related software and hardware,the unique advantages it brings benefits multiple fields,especially in the medical field.The virtual surgical system has a huge impact on traditional surgical methods and methods,and has caused a revolutionary storm.The traditional surgical procedure has many shortcomings:the high risk of surgery,the unsatisfactory postoperative effect of the patient,the level of the doctor,and the inability to assess the surgical procedure.Virtual surgery can help us to simulate before surgery,to predict the complexity of surgery,to appreciate and learn how to deal with clinical operations in actual situation and reduce the risk of surgery.At present,the domestic virtual surgery system uses a simulated operation training box.The efficiency of surgical training is low.The foreign equipment is expensive and cannot be promoted.Virtually,virtual surgery rarely uses VR helmets and lacks 3D immersive visual effects,as well as the processing capacity for individualized cases.In order to truly observe the structure of the human abdominal organs,provide personalized diagnosis,and improve the surgical skills of doctors,this article designs a virtual surgical system for abdominal organs based on VR helmets.Specific in-depth research from the following modules:(1)Three-dimensional modeling and model simplification of human abdominal organs.Using edge detection,3D-Labeling algorithm and differential algorithm to segment the organs and tissues in the arterial phase and portal vein phase of the CT image,and extract the abdominal organs through different thresholds corresponding to labels and tags,and perform three-dimensional modeling.The use of quadratic error metric-based edge folding algorithm can simplify a large number of triangular patches in the mesh model,reducing the enormous burden on the computer system in drawing,calculation,storage and processing,and maintaining the original shape of the model.(2)Collision detection of the model.In this module,the commonly used bounding box collision detection algorithm and different model were introduced.Aimed at the real-time and accuracy requirements of the virtual surgery,we adopted a based on hierarchical bounding boxes(AABB)and Mesh Collider collision detection algorithms to determine whether the surgical instrument has collided with the organ model.(3)Cutting the model.For the three-dimensional reconstruction of the abdominal organ model,the surgical instrument was used to cut the abdominal organs to simulate the operation and to obtain the three-dimensional model after cutting.The experimental results show that the our system can automatically realize 3D reconstruction of human abdomen model and simplify the model.With VR helmet,you can see the abdomen organ directly and provide virtual tool set(operating knife,surgical forceps),which can be used to cut the abdominal organs.