| 改进的电阻抗反投影成像算法 |
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| 引用本文： | 罗辞勇,朱清友. 改进的电阻抗反投影成像算法[J]. 重庆大学学报(自然科学版), 2009, 32(3): 243-246 |
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| 作者姓名： | 罗辞勇 朱清友 |
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| 作者单位： | 罗辞勇,LUO Ci-yong(重庆大学电气工程学院,输配电装备及系统安全与新技术国家重点实验室,重庆,400030);朱清友,ZHU Qin-you(长江师范学院,物理学及电子信息工程系,重庆,涪陵,408003) |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 在等位线反投影算法基础上,结合计算机断层成像中均值反投影理论,形成应用于电阻抗成像的改进反投影算法.改进算法以注入电极对中点到测量电极对中点的长度作为投影路径的近似长度,在反投影的过程中考虑投影长度的影响;计算反投影后相对电导率的正负均值;最终的相对电导率值是在反投影结果基础上根据符号减去相应的均值,如果改变符号就令相对值为0.仿真和水槽实验验证均改进电阻抗反投影算法相比于等位线反投影算法可以减小重构图像的星状伪迹.改进电阻抗反投影算法是实用有效的.
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| 关 键 词： | 电阻抗成像 逆问题 反投影 伪迹 星状伪迹 |
An improved back-projection algorithm for electrical impedance tomography |
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| LUO Ci-yong and ZHU Qin you. An improved back-projection algorithm for electrical impedance tomography[J]. Journal of Chongqing University(Natural Science Edition), 2009, 32(3): 243-246 |
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| Authors: | LUO Ci-yong and ZHU Qin you |
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| Affiliation: | 1.State Key Laboratory of Power Transmission Equipment & System Security and New Technology;College of Electrical Engineering;Chongqing University;Chongqing 400030;P.R.China;2.Department of Physics and Electronic Information Project;Yangtze Normal University;Fuling 408003;P.R.China |
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| Abstract: | An improved mean back-projection algorithm based on an isopotential back-projection algorithm of electrical impedance tomography(EIT) is presented by adopting the mean back-projection theory of computer tomography.The distance from the midpoint of an injected electrode pair to the midpoint of a measured electrode pair is taken as approximately the length of the projection routine which is introduced into the back-projection process.The positive and negative mean values of relative conductivities obtained by... |
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| Keywords: | electrical impedance tomography inverse problems back-projection artifact asteroid trace |
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