实验科学与技术2019，Vol.17Issue(1)：17-22,45,7.DOI:10.3969/j.issn.1672-4550.2019.01.004
基于图像重建的CT系统参数标定与成像模型
The Model of CT System Parameter Calibration and Imaging Based on Image Reconstruction
摘要
Abstract
For the CT system, the problem of the shape of the medium is determined by the received information of the detector.firstly, based on the analytic geometry principle, We analyze the relationship among the rotation center, the X-ray direction, the medium absorption rate, and the data received by the detector.Then, according to the data measured by the calibration template, the parameters of the CT system are obtained by using regression analysis, double search and other algorithms.Finally, based on the Fourier Slice Theorem, an imaging model of CT system is established.Through the filtered back projection method in image reconstruction and the corresponding translation transform, the gray matrix of the unknown medium is obtained so that the shape of the medium is determined.Experimental results show that this method has strong reliability and great accuracy in image reconstruction of CT system.关键词
CT系统/参数标定/回归分析/图像重建/滤波反投射Key words
CT system/parameter calibration/regression analysis/image reconstruction/filtered backprojection分类
数理科学引用本文复制引用
万犇,贾昀达,王宏晔,张勇..基于图像重建的CT系统参数标定与成像模型[J].实验科学与技术,2019,17(1):17-22,45,7.基金项目
国家自然科学基金(11271001) （11271001）
电子科技大学中央高校基本科研业务项目(ZYGX2014Z012). （ZYGX2014Z012）
