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浙江大学学报(工学版)
J4  2011, Vol. 45 Issue (10): 1848-1854    DOI: 10.3785/j.issn.1008-973X.2011.10.025
电气工程     
注入及感应电流磁共振电阻抗成像对比
刘阳1, 戴松世2
1.厦门理工学院 电子与电气工程系,福建 厦门 361024；2.浙江大学 电气工程学院,浙江 杭州 310027
Comparison between injected current and induced current magnetic
resonance electrical impedance tomography
LIU Yang1, DAI Song-shi2
1. Department of Electronic and Electrical Engineering, Xiamen University of Technology, Xiamen 361024, China;
2. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
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摘要：

为了对比注入电流磁共振电阻抗成像(MREIT)及感应电流磁共振电阻抗成像(IC-MREIT)用于重构人体头部组织电导率分布的性能,分别在3层球头模型及包含5种组织的真实头模型上进行仿真.正问题仿真结果表明：在满足人体安全性要求的前提下,2种成像方法在头部组织内产生的电流密度的强度处于同一数量级,但IC-MREIT产生的电流密度略大且分布受颅骨影响较小.基于J-substitution算法的逆问题仿真结果表明：对于3层球头模型,IC-MREIT能够在较少的迭代次数内,以更高的精度重构出电导率分布；对于真实头模型,MREIT具有更好的收敛特性和成像精度.
Abstract:

The simulations were conducted on the threesphere head model and fivecompartment realistic head model in order to evaluate the performance of the injected current magnetic resonance electrical impedance tomography (MREIT) and the induced current magnetic resonance electrical impedance tomography (IC-MREIT) to image the conductivity distribution of head-brain tissues. The simulation results of the forward problem show that the current densities in the head produced by MREIT and IC-MREIT are of the same order of magnitude when the safety requirement is satisfied. The current density produced by IC-MREIT is a little larger and is less affected by the skull. The simulation results of the inverse problem based on the J-substitution algorithm indicate that IC-MREIT can image the conductivity distribution with higher accuracy than MREIT in less iterations for the threesphere head model; the convergence behavior and imaging precision of MREIT are superior to IC-MREIT for the realistic head model.
出版日期: 2011-10-01
:  TM 15  
基金资助:

福建省教育厅A类资助项目（JA11233）；厦门理工学院人才引进基金资助项目（YKJ10041R）.
作者简介: 刘阳(1980—),女,讲师,从事生物电阻抗成像研究.E-mail:liuyang@xmut.edu.cn
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引用本文:

刘阳, 戴松世. 注入及感应电流磁共振电阻抗成像对比[J]. J4, 2011, 45(10): 1848-1854.

LIU Yang, DAI Song-shi. Comparison between injected current and induced current magnetic
resonance electrical impedance tomography. J4, 2011, 45(10): 1848-1854.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2011.10.025    或    https://www.zjujournals.com/eng/CN/Y2011/V45/I10/1848

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