[1]张路,林勇康,艾昕晨,等.基于PSO算法的CT系统标定模板的优化设计[J].计算机技术与发展,2018,28(11):203-207.[doi:10.3969/j.issn.1673-629X.2018.11.044]
　ZHANG Lu,LIN Yong-kang,AI Xin-chen,et al.Optimization Design of CT System Calibration Template Based on PSO[J].,2018,28(11):203-207.[doi:10.3969/j.issn.1673-629X.2018.11.044]
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基于PSO算法的CT系统标定模板的优化设计()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
28
期数:
2018年11期
页码:
203-207
栏目:
应用开发研究
出版日期:
2018-11-10

文章信息/Info

Title:
Optimization Design of CT System Calibration Template Based on PSO
文章编号:
1673-629X(2018)11-0203-05
作者:
张路1; 林勇康2; 艾昕晨2; 沙超1; 王汝传1
1.南京邮电大学 计算机学院、软件学院、网络空间安全学院,江苏 南京 210003; 2.南京邮电大学 电子与光学工程学院、微电子学院,江苏 南京 210003
Author(s):
ZHANG Lu1 ; LIN Yong-kang2; AI Xin-chen 2; SHA Chao1; WANG Ru-chuan1
1. School of Computer Science,Software and Cyberspace Security,Nanjing University of Posts and Telecommunications,Nanjing 210003,China; 2. School of Electronic,Optical Engineering and Microelectronics,Nanjing University of Posts and Telecommunications,Nan
关键词:
PSO算法;  CT系统;  参数标定;  多目标规划
Keywords:
PSO; computed tomography system; parameter calibration; multi-objective programming
分类号:
TP391
DOI:
10.3969/j.issn.1673-629X.2018.11.044
文献标志码:
A
摘要:
计算机断层扫描技术是当今最先进的成像技术之一,CT系统可以在维持样品原样的情况下,根据样品某一断层对射线的吸收和透过率的不同,获取断面图像,凭借其非接触、高分辨率、无破坏性等优点在临床医学、生物、工业等领域有着广泛的应用.然而,在CT系统安装后,误差往往是不可避免的,例如旋转中心、旋转角等参数误差,需要利用已知结构的模板进行误差参数标定和补偿.因此,标定模板的设计就会影响到最终系统成像的质量.对此,提出了一种基于PSO算法的CT系统标定模板的设计方案,根据三个目标函数,即标定精度尽量高、单个探测器的接收信息方差尽量大、探测器的利用率尽量高,以及相关约束条件建立多目标规划模型,并运用PSO算法进行求解,具有收敛快、精度高等优点.
Abstract:
Computed tomography (CT) is one of the most advanced imaging techniques. The CT system can be used to obtain the image of the cross section according to the different absorption and transmittance of the sample,without destroying it. With the advantages of non-contact,high resolution and no destructive,it is widely used in clinical medicine,biology,industry and other fields. However,after the installation of CT system,the error such as rotation center and rotation angle is usually unavoidable,and the error parameter calibration and compensation should be carried out with the help of the template of the known structure. Therefore,the design of the calibration template will affect the quality of the final image. A design scheme for the calibration template of CT system based on PSO is proposed. In this scheme,the PSO is used to solve a multi-objective programming model built with three objectives which are composed of high calibration accuracy,large variance of the detector’s receiving information,high utilization of the detector,together with related constraints.Simulation shows that this method not only convergences fast,but also ensures a higher precision.

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更新日期/Last Update: 2018-11-10