基于改进图像重建算法的工业CT系统

目前工业CT扫描只能得到某一断面上的二维信息,不能得到被检测物的整体描述,人们希望获得具有高真实感的三维图像;Smith和Grangeat分别提出了三维投影重建算法,H.Kudo在对两种算法分别进行研究的基础上,提出了Smith-Grangeat方法,同时继承了两种算法的优点,但存在图像明显失真和衰减问题;通过对Smith-Grangeat方法进行改进,使图像失真减小;仿真结果验证了算法的有效性和工程实用性.

ICT System Based on Improved Image Reconstruction Algorithms

Most of the traditional industrial computed tomography facility can only get the 2-D information which might be very limited to determine the perfect spatial location and the exact area of the details. Therefore, there is a need to reconstruct 3-D images. Smith and Grangeat proposed separately 3- D iterative projection method. Based on the study of the two methods H. Kudo proposed Smith- Grangeat method which inherits advantages of the two methods. The disadvantage of Smith-Grangeat method is that there are obvious distortion and attenuation in the image. Smith-Grangeat method is improved to minish distortion. The results of simulation show that the algorithm is effective and useful for engineering application.