CT系统参数标定及成像研究与设计  

Research and Design of CT System Parameter Calibration and Imaging

作　　者：徐沈阳 马婧元 韩刚 汪晓银[4] 刘秀明[1] XU Shenyang;MA Jingyuan;HAN Gang;WANG Xiaoyin;LIU Xiuming(School of Textiles,Tianjin Polytechnic University,Tianjin 300387;School of Mechanical Engineering,Tianjin Polytechnic University,Tianjin 300387;School of Electronics and Information Engineering,Tianjin Polytechnic University,Tianjin 300387;School of Science,Tianjin Polytechnic University,Tianjin 300387)

机构地区：[1]天津工业大学纺织学院,天津300387 [2]天津工业大学机械工程学院,天津300387 [3]天津工业大学电子与信息工程学院,天津300387 [4]天津工业大学理学院,天津300387

出　　处：《首都师范大学学报（自然科学版）》2019年第1期24-29,共6页Journal of Capital Normal University：Natural Science Edition

基　　金：国家科技支撑计划资助项目(2014BAE01B01);国家级创新训练项目(201710058010);天津市应用基础与前沿技术研究计划资助项目(14JCZDJC37200)

摘　　要：CT系统除需要设备支持外,参数标定精度和成像模型对扫描效果具有显著影响.本文巧妙地利用模板与探测器的关系,寻找最佳标定位置,精确地对CT扫描系统进行参数标定,在此基础上,建立含有插值、滤波、局部搜索算法的CT介质成像优化模型,并列举实例进行图像重构模拟分析,最后利用逐差法设计更加精确的标定模板.In the CT system,parameter calibration accuracy and imaging model had a significant impact on the scanning results besides equipment support. In this paper, the relationship between the template and the detector was used to find the best calibration position skillfully, and the CT scan system was calibrated accurately. Based on this, a CT medium imaging optimization model was established based on interpolation, filtering and local search algorithm, then we enumerated examples for image reconstruction simulation analysis. Finally, a more accurate calibration template was designed by using the successive difference method.

关 键 词：CT 系统 介质成像模型 局部搜索算法 逐差法 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] O434.19[自动化与计算机技术—计算机科学与技术]