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A contact state detection method of electrodes for electrical impedance detection based on measurement accuracy

A technology of electrode contact and measurement accuracy, which is applied in diagnostic recording/measurement, application, medical science, etc., can solve problems such as unstable measurement data, signal quality degradation, uncertainty, etc., and achieve the goal of ensuring convenience and accuracy Effect

Active Publication Date: 2019-07-05
FOURTH MILITARY MEDICAL UNIVERSITY
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Problems solved by technology

The previous research results show that, in addition to the hardware system itself, the contact effect between the electrode and the skin is a key factor affecting the signal measurement quality: when there is poor contact, on the one hand, the measurement system will be more sensitive to external interference, and on the other hand On the one hand, the uncertainty of the measurement data will be introduced due to the instability of the contact impedance, which will lead to the decline of the overall signal quality and the artifact of the imaging results

Method used

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  • A contact state detection method of electrodes for electrical impedance detection based on measurement accuracy
  • A contact state detection method of electrodes for electrical impedance detection based on measurement accuracy
  • A contact state detection method of electrodes for electrical impedance detection based on measurement accuracy

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Embodiment Construction

[0043] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0044] The present invention provides a measurement accuracy-based electrode contact state detection method for electrical impedance detection, using the original transmission impedance data collected by the imaging system for a period of time, through statistical analysis, to obtain the relative measurement accuracy of each measurement channel, and then through further Calculate and analyze to obtain the average measurement accuracy related to each measurement and excitation electrode pair, and determine the contact quality between the electrode and the skin according to the range of the average measurement accuracy.

[0045] 1. Working principle of electrical impedance imaging data acquisition

[0046] The bioelectrical impedance imaging system collects and images the electrical impedance i...

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Abstract

The invention discloses an electrode contact state detecting method for electrical impedance detection based on measurement precision, and belongs to the technology and application field of bioelectrical impedance imaging. The method comprises the steps that original transmission impedance data collected by an imaging system within a period of time is utilized for acquiring the relative measurement precision of all measurement channels through statistic analysis; the related average measurement precision of all measuring and exciting electrode pairs is acquired through further operational analysis, and the contact state of an electrode and skin is detected according to the range of the average measurement precision. The method can be used for detecting the electrode contact quality fast and accurately in real time, therefore, it is possible for operators to fast eliminate electrode connecting anomaly in time, and reference bases are provided for evaluation of continuous electrical impedance data collecting quality.

Description

technical field [0001] The invention belongs to the field of bioelectrical impedance imaging technology and application, and relates to an electrical impedance data acquisition technology, in particular to a method for detecting the contact state of an electrode for electrical impedance detection based on measurement accuracy. Background technique [0002] The electrical impedance imaging technology is to sequentially inject weak, completely non-invasive AC currents into the human body through electrodes attached to the body surface, and measure the response voltage signals on each relevant electrode pair, and then use a specific image reconstruction algorithm to construct An imaging technique that reflects images of tissue resistivity distribution or changes in the target area. Since the resistivity of living tissue is closely related to the functional state of the tissue, electrical impedance imaging technology has the advantage of functional imaging, and can realize the u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/053
CPCA61B5/0531A61B5/0536A61B2562/0209
Inventor 史学涛董秀珍祁琦李衡尤富生季振宇付峰刘锐岗夏军营刘本源
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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