Design And Implementation Of Trunk Images Registration And 3D Reconstruction System

Medical image registration is an important premise of medical image analysis.PET/CT image is an important basis of tumor early diagnosis and treatment planning.In this paper,image registration technology is used to build standard model of trunk which assists doctor to contrast and grasp the human shape and is the basis of the statistical analysis.Due to the differences of individuals,image artifacts and noise bring great challenges to registration,so how to register the trunk image is an important subject.3D reconstruction can clearly show the complex characteristics and three dimensional space of medical image.Using 3D printing technology to make low cast and accurate 3D physical model is helpful for a better assisted surgery.Based on a lot of study and research on related literatures and technologies,this paper developed a trunk image registration and 3D reconstruction system,including:(1)Trunk image denoising,resampling and region growing segmentation are used in preprocessing.(2)A 3D trunk image registration method based on automatic identification of trunk region and extraction of feature points is proposed.(3)Because the model surface generated by marching cubes is not smooth,a 3D model optimization method is proposed and applied to 3D printing.(4)In terms of software development,a fully visualization software system of automatic registration of trunk image and 3D reconstruction which is applied to 3D printing is developed,and an interactive tool for organ segmentation based on grab cut is implemented.In order to test the reliability of the system,this paper uses the actual PET/CT image data to do experiments.As the experiments show that registration method in this paper has a high registration precision,fast registration speed.And the usability of registration system is strong.The proposed 3D surface rendering and model optimization method can effectively solve the problem that the model surface is not smooth and reduce the number of vertices and triangles.The physical model of human organ completed by 3D printing represents the real human organ and the surface of physical models is smooth.