| Research background:In modern war,the main injuries are explosive injuries,blast injuries,firearm injuries and burns caused by high-speed,high-energy and high-precision weapons,which are characterized by heavy injuries,multiple damaged organs and complex injuries.Craniomaxillofacial(CMF)injuries are one of the common forms of injuries.The project first carried out immersive visualization simulation of CMF trauma,and implanted it into the head-mounted VR hardware platform to conduct visualization simulation of cranial-maxillofacial trauma injury judgment analysis and treatment training process in a realistic virtual battlefield environment,so as to deepen the trainees’ intuitive understanding and awareness.At the same time,the training effect of trainees was assessed to effectively improve the specialized treatment ability of medical staff of mobile medical service teams and junior specialists in health institutions for CMF trauma.It is of great significance to greatly reduce the death rate of wartime injury,to minimize the degree of facial deformity and functional dysfunction,and to reduce the difficulty of later surgical rectification.Objective:To develop a simulated treatment system for maxillafacial combat trauma to effectively strengthen the medical work of mobile medical teams and the professional skills of junior specialists in military health institutions.Methods:Firstly,the prescription treatment specification for CMF war trauma was established.The hardware architecture of the VR-CMTT(Virtual Training System for Craniomaxillofacial Trauma Treatment)system is built on the basis of high-performance Graphics Workstation and HTC VIVE suite.The software framework of the VR-CMTT system is mainly divided into four layers.The data layer includes control scripts for realizing various functions of the system.In the service layer,the system adopts Unity3D engine for development In the business logic layer,a series of simulation of treatment process is realized,and assessment information is provided at the end of training.In the presentation layer,users are provided with an immersive surgical training experience through the HTC VIVE head-mounted display.In order to realize the simulation of surgical process and restore the real surgical scene to the greatest extent,The VR-CMTT system will mainly develop four functional modules.The first part is the construction of virtual scene.The second part is model loading and rendering.The third part is virtual interactive operation.Finally,the assessment module mainly records and evaluates the treatment process and training time.Results:The VR-CMTT system is developed with Unity3D to build a realistic virtual battlefield environment.By writing and integrating relevant modules,it realizes the simulation of a series of processes of battlefield casualty detection and treatment Moreover,it is mounted on HTC Vive platform and realizes virtual interaction with VR technology.The VR-CMTT system realizes four functional modules.The first functional module is scene building and model construction.The scene building and model of the VR-CMTT system mainly include virtual battlefield environment and virtual rescue scenarios.Virtual battlefield environment mainly consists of three parts:geographic environment model,battlefield entity model and battlefield special effect model.The virtual rescue scenario mainly consists of human body model,surgical environment model and surgical instrument model.The second functional module is model loading and rendering,which includes collision detection and blood simulation algorithm.The third functional module is virtual interaction.The fourth functional module is appraisal and evaluation.Conclusion:The system has realized the visual simulation of cranial-maxillofacial injury judgment,analysis and treatment training process in the realistic virtual battlefield environment so as to improve the specialized treatment capacity for cranial-maxillofacial trauma. |
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