A Dynamic Electrical Impedance Imaging Method Based on Electrode Sampling Calibration

An imaging method, dynamic resistance technology, applied in medical science, diagnosis, diagnostic recording/measurement, etc.

Active Publication Date: 2022-02-01
FOURTH MILITARY MEDICAL UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

[0004] Aiming at the problem of improving the stability and reliability of EIT imaging under noise and interference environment, the purpose of the present invention is to provide a dynamic electrical impedance imaging method based on electrode sampling verification to improve the effective imaging standard and judge the effective imaging

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  • A Dynamic Electrical Impedance Imaging Method Based on Electrode Sampling Calibration

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] Based on the problems existing in the prior art, the present invention proposes a dynamic electrical impedance imaging method based on electrode sampling verification from the perspective of imaging. The basic idea is: in an EIT system, there are usually 16 electrodes, Select the measurement results of odd-numbered electrodes and even-numbered electrodes for imaging, and then check the consistency of the results. When the consistency is good, the imaging is considered reliable. Otherwise, the imaging is considered to be too seriously affected by noise or interference, and the obtained imaging results are not credible.

[0038] Specifically, refer to figure 1 , the method of the present invention comprises the following steps:

[0039] Step 1: Sequentially number the EIT measuring electrodes and divide the EIT measuring electrodes into three grou...

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Abstract

The invention discloses a dynamic electrical impedance imaging method based on electrode sampling verification. In the method, the EIT measuring electrodes are sequentially numbered and divided into three groups: all electrodes, odd-numbered electrodes and even-numbered electrodes; Boundary measurement potential, calculate the boundary potential changes of the three groups of electrodes respectively; calculate the reconstruction results under the measurement data of the three groups of electrodes according to the changes of the three groups of electrode boundary potentials, and draw the EIT reconstruction images corresponding to the reconstruction results respectively; according to the step three groups of electrode measurement data The correlation coefficients between the reconstruction results are calculated respectively for the reconstruction results below; the credibility of the reconstruction results and the credibility of the EIT reconstruction images corresponding to the three reconstruction results are judged according to the correlation coefficients. The method proposed by the invention provides additional effective imaging judgment criteria for EIT in a measurement environment where noise and interference exist, and improves imaging reliability.

Description

technical field [0001] The invention belongs to the field of electrical impedance tomography (Electrical Impedance Tomography, EIT), in particular to a method for improving the stability and reliability of dynamic EIT imaging, in particular to a dynamic electrical impedance imaging method based on electrode sampling verification. Background technique [0002] In Electrical Impedance Tomography (EIT), 16 electrodes are evenly placed on the body surface of the human body, a safe current is injected into the human body through the electrode pairs according to certain rules, and the remaining electrodes can measure the response potential after excitation. Based on the boundary potential data measured by the electrodes, the data at two moments are selected for difference, and then combined with the corresponding algorithm, the image of the impedance change during this period can be reconstructed, and then the physiological and pathological changes that occur inside the human body ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/0536
CPCA61B5/0536A61B5/72
Inventor 李昊庭付峰马航徐灿华杨滨代萌董秀珍
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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