New Method to Reconstruct Static Image in Electrical Impedance Tomography

HOU Wei-dong; MO Yu-long

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New Method to Reconstruct Static Image in Electrical Impedance Tomography

更新时间：2025-07-16

- New Method to Reconstruct Static Image in Electrical Impedance Tomography
- Acta Electronica Sinica Vol. 31, Issue 7, Pages: 1083-1085(2003)
- 作者机构：
  
  上海大学通信工程系,上海,200072
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN911.73
- Published：2003
- 稿件说明：
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HOU Wei-dong, MO Yu-long. New Method to Reconstruct Static Image in Electrical Impedance Tomography[J]. Acta Electronica Sinica, 2003, 31(7): 1083-1085.
DOI：

HOU Wei-dong, MO Yu-long. New Method to Reconstruct Static Image in Electrical Impedance Tomography[J]. Acta Electronica Sinica, 2003, 31(7): 1083-1085. DOI：

摘要

阻抗断层图像重建是一个严重病态的非线性的逆问题

特别是在静态阻抗断层成像中

由于其图像重建模型误差和测量噪声的影响更为严重

因此常用的基于目标函数梯度信息不断迭代的改进的Newton-Raphson类重建算法

即使使用正则化技术

其稳定性仍较差

甚至发散.本文提出一种全新的静态阻抗断层图像重建方法

它利用基于生物自然选择与遗传机理的遗传算法去搜索阻抗图像重建问题的最优解

无需正则化技术

也不会象改进的Newton-Raphson类算法那样易陷入局部最优解.实验结果也表明基于遗传算法的图像重建方法重建的静态阻抗断层图像

其成像精度和空间分辨率都大大好于改进的Newton-Raphson类重建算法.

Abstract

Image reconstruction in electrical impedance tomography (EIT) is a highly ill-posed

non-linear inverse problem.Especially in static EIT

the modified Newton-Raphson (MNR) reconstruction algorithm with regularization technique based on minimizing the object function is usually not stable

even divergent

due to the serious image reconstruction model error and measurement noise.A new static image reconstruction method for EIT based on genetic algorithm (GA-EIT) is proposed in this paper

in which the global optimized solution for EIT problem will be converged by evolution without need of regularization.The experimental results also indicate that the performance (including the precision and space resolution in reconstructing the static EIT image) of the GA-EIT algorithm is better than that of the MNR algorithm.

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