The Design And Implementation Of Computer-aided Medical Diagnosis Platform Based On 3D Reconstruction Technology

Three-dimensional(3D)reconstruction is an important technology in medical visualization.The purpose is to assist medical diagnosis and treatment by using computer to show the volume data collected by medical imaging equipment onto the screen.Analyzing and processing massive amounts of data with computer provides a reliable and accurate means for people to study volume data.In computer-aided diagnosis,the 3D reconstruction of the data obtains an intuitive three-dimensional structure to guide the diagnosis process by analyzing the area of interest.However,due to the complexity of the volume data and the limitations of the technology,there are many deficiencies in the current image reconstruction quality,which can't meet the requirements of higher real-time performance and high precision.In addition,in order to develop a better treatment plan,more flexible operations are needed to observe and analyze the reconstruction results.How to use 3D reconstruction to provide higher quality rendering images,and how to build a more flexible and friendly man-machine interface is a key issue.This paper addresses the application requirements of computer-aided diagnosis technology,and focuses on how to draw high-quality images,how to improve display efficiency,how to highlight interesting information,and how to design a better man-machine interface.To solve the above problems,this paper studies three-dimensional reconstruction technology,human-computer simulation technology and its specific implementation.The research results of this paper are as follows:1)In order to obtain high-quality rendering results,this paper studies and implements surface rendering and volume rendering methods of 3D reconstruction techniques.In surface rendering,the principles and problems of surface rendering methods based on mobile cubes are studied.Anisotropic diffusion algorithms and 3D region growing algorithms are used to solve ambiguities and broken bones,which increases the realism and smoothness of images..In volume rendering,in order to take full advantage of the parallel advantages of modern GPUs,the principles,processes,and problems of GPU-based ray casting algorithms are studied,and software accelerated solutions are further studied,including light termination methods,adaptive sampling,and tightness.Caused by the enclosure,effectively improving the efficiency of volume rendering.2)Traditional volume rendering is based on monomodal images and does not provide enough feature information to segment the image.In order to display three-dimensional image details and take full advantage of the multi-modal image feature information,this paper studies the widely used multi-scale multi-modal image fusion methods,such as wavelet transform andshear wave transform.After analyzing the principle of the complex shear wave and the fusion gauge process,a multi-modal image fusion method based on complex shear wave is proposed.Based on this,combined with the complex shear wave-body rendering equation,the volume rendering process based on multi-modal image fusion is given.3)In order to highlight the area of interest,a reasonable transfer function must be used.The traditional one-dimensional or two-dimensional transfer function can classify the data,however,it cannot divide the explicit boundary information.The contour tree represents the spatial topological relationship of volume data.Topological analysis can extract fine boundary information.Therefore,the use of contour tree can guide the design of transfer function better.This paper studies the traditional contour tree construction algorithm,and proposes a multi-thread based contour tree acceleration construction algorithm.Combined with the contour tree construction algorithm,the traditional rendering mode was studied and improved,and an efficient volume rendering framework was designed.4)Based on the above research,this paper designs and implements a computer-aided medical diagnostic platform based on three-dimensional reconstruction.By analyzing the advantages and disadvantages of the current three-dimensional reconstruction software,the system functions realized in this paper are more comprehensive,including DICOM image processing,surface rendering and volume rendering.Secondly,the general idea,overall design,detailed function modules and key technologies of this system are introduced in detail.In order to improve the human-computer interaction effect,an intuitive,simple and easy-to-use interface was researched and designed to provide various views and user operations.