Research On Immersive Visualization Of Lumbar Spine Finite Element Results

The lumbar vertebra is the largest vertebral body in the human body.Performing a finite element analysis on the lumbar vertebrae can provide doctors with detailed mechanical information.Different visualization methods of finite element analysis results can affect the meaning,dimensionality and type of data presentation,and suitable visualization methods can improve doctors’ comprehension of the results.Nevertheless,non-intuitive and complex finite element analysis software user interfaces increase the challenge for doctors to comprehend and analyse results.To address the visualization issue of finite element results in lumbar vertebrae,pertinent information is extracted from the finite element results,and relevant technologies such as fusion of temporal unstructured grid models and employment of augmented reality are combined.Consequently,an immersive visualization approach for lumbar finite element results is proposed.The specific research content is outlined below:Firstly,finite element analysis was conducted on the lumbar vertebra to obtain insights on its pathological conditions.By analyzing the anatomical structure of the spine,selecting the part of the lumbar spine that is prone to lesions and reconstructing it into a three-dimensional model and optimizing the surface of the model,setting parameters such as material properties,mesh division,load and boundary conditions and then performing finite element analysis of the forward flexion motion of the lumbar spine,the doctor provides reference for the diagnosis and treatment of the disease based on the results of the finite element analysis;Secondly,in order to construct fused multidimensional temporal finite element models,the various expressions of finite element data in Abaqus and VTK were analyzed.Valid information was extracted from lumbar vertebral finite element results files using Python programming language.Results data located at nodes and units were fused to create temporally non-structured mesh models.The resulting model was mapped to a version that could be used with an augmented reality platform through topological transformation.Finally,as an illustrative example,the immersive visualization approach for lumbar vertebral finite element results was employed to analyze the requirements of the corresponding visualization system.A virtual scene was designed using Unity3 D,which included rendering the model,dynamic loading,and cutting.Key technologies involved in the immersive visualization of lumbar vertebral finite element results were analyzed and designed,including the 3D tracking registration process,as well as the design of virtual and augmented reality display and human-computer interaction methods.The effectiveness and practicality of the system are verified by completing its configuration and deployment.The results demonstrate the system’s robust immersion and highly interactive user interface,which enable doctors to quickly and precisely provide comments based on the findings of lumbar finite element analysis.As a result,the system presents a novel method for viewing the results of various tissue organs’ biomechanical finite element analysis.