Optimization of 3D Reconstruction Technique for CT Image and Analysis of the Derived Model

The technology of 3D reconstruction of medical image can provide more comprehensive and detailed information for doctors. This paper analyses the efficiency of traditional marching cubes(MC) algorithm and its derivative algorithms, puts forward an improved MC algorithm which can improve drawing efficiency by quadratic median approximation method instead of linear interpolation method. With the aid of visualization toolkit(VTK), the improved algorithm can reconstruct the 3D view of CT image and export corresponding model. Moreover, the paper analyses the 3D model's mechanical characteristics with a finite element analysis software. The experiment shows that the improved MC algorithm can effectively improve the reconstruction efficiency, the reconstruction model can meet the requirements of finite element method and the analysis results bear great applicable significance.