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首页> 外文期刊>IEEE Transactions on Biomedical Engineering >Simple Linear Models of Scanning Impedance Imaging for Fast Reconstruction of Relative Conductivity of Biological Samples
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Simple Linear Models of Scanning Impedance Imaging for Fast Reconstruction of Relative Conductivity of Biological Samples

机译:用于快速重建生物样品相对电导率的扫描阻抗成像的简单线性模型

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摘要

Scanning impedance imaging (SII) uses a noncontacting electrical probe held at a known voltage and scanned over a thin sample on a ground plane in a conductive medium to obtain images of current. The current image is related in a nonlinear way to the conductivity of the sample. This paper develops the theory behind SII showing how the measured current relates to the desired conductivity. Also included is the development of a simplified, linear model that is effective in explaining many of the experimental results. Good agreement of the linear model with step-response data over an insulator is shown. The linear model shows that the current is a blurred version of the conductivity. Simple deblurring methods can, therefore, be applied to obtain relative conductivity images from the raw current data. Raw SII data from a flower-petal and a leaf sample are shown as well as relative conductivity images deblurred using the linear model
机译:扫描阻抗成像(SII)使用保持在已知电压下的非接触式电探针,并在导电介质中的地平面上的薄样本上进行扫描,以获取电流图像。当前图像以非线性方式与样品的电导率相关。本文提出了SII背后的理论,该理论显示了被测电流与所需电导率之间的关系。还包括简化的线性模型的开发,该模型可有效地解释许多实验结果。显示了线性模型与绝缘子上阶跃响应数据的良好一致性。线性模型表明电流是电导率的模糊形式。因此,可以应用简单的去模糊方法来从原始电流数据获得相对电导率图像。显示了来自花瓣和叶子样品的原始SII数据以及使用线性模型去模糊的相对电导率图像

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