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Three-dimensional electrical impedance tomography method based on crisscross-arranged electrodes

A technology of electrical impedance tomography and imaging method, applied in the directions of diagnosis, application, diagnosis recording/measurement, etc., can solve the problems of difficult matrix inversion, low detection sensitivity, low quality of three-dimensional image reconstruction, etc., to save computing time , obvious technical advantages, the effect of highlighting substantive characteristics

Active Publication Date: 2012-09-26
SEALAND TECH CHENGDU
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Problems solved by technology

[0006] The purpose of the present invention is to provide a three-dimensional electrical impedance tomography method based on electrodes arranged in a staggered manner, which mainly solves the problems of low detection sensitivity of the existing EIT to the target, low quality of three-dimensional image reconstruction, and difficult matrix inversion question

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  • Three-dimensional electrical impedance tomography method based on crisscross-arranged electrodes

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[0036] Based on the three-dimensional electrical impedance tomography method in which the electrodes are arranged in a staggered manner, electrodes are placed on the surface of the object to be measured in the three-dimensional image, and the electrodes are arranged on the surface of the object to be measured in the three-dimensional image in a staggered manner, as shown in figure 1 As shown, while the existing electrode arrangement is as follows figure 2 shown. After the electrode is placed, the finite element model is obtained through the object to be measured in the three-dimensional image. In order to quickly locate the object to be measured in the three-dimensional image, in the present invention, the finite element model is obtained by meshing the object to be measured in the three-dimensional image. The model, specifically, uses a tetrahedral mesh to subdivide the object to be measured in the 3D image. Use the finite element model divided by the electrode pair to coll...

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Abstract

The invention aims at providing a three-dimensional electrical impedance tomography method based on crisscross-arranged electrodes, comprising the following steps of: (1) putting the electrodes on the surface of a body to be measured of a three-dimensional image, wherein the electrodes are crisscross arranged on the surface of the body to be measured of the three-dimensional image; (2) obtaining a corresponding finite element model through the body to be measured of the three-dimensional image, carrying out data acquisition on the finite element model by the electrodes, and computing a differential voltage signal yi=vi-v0 according to the acquired data; (3) computing the approximate value of the change of the specific conductance of the body to be measured of the three-dimensional image; and (4) computing the obtained approximate value within the finite element model to be displayed, wherein the displayed image is a real-time difference image of the body to be measured of the three-dimensional image. The electrodes are crisscross arranged on the surface of the body to be measured of the three-dimensional image, compared with the prior art, the method can obviously improve the reconfiguration quality of the three-dimensional image and the detection sensitivity of a target.

Description

technical field [0001] The invention relates to an electrical impedance tomography method, in particular to a three-dimensional electrical impedance tomography method based on electrodes arranged in a staggered manner. Background technique [0002] Electrical impedance tomography (EIT) is a new imaging technology that is nondestructive and harmless. EIT places electrodes on the surface of the object to inject low-frequency and low-power current, and detects the impedance distribution inside the object by detecting the voltage difference between the electrodes. Since the impedance characteristics of different biological tissues are different, using EIT technology to detect them can reflect the physiological characteristics of each biological tissue in terms of structure and function. Compared with nuclear medicine imaging techniques such as CT and MRI, EIT has the advantages of non-destructive and harmless, low cost, small size, and sensitivity to early cancer lesions, but t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/053
Inventor 蒲洋戴涛向飞
Owner SEALAND TECH CHENGDU
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