Electrode contact state detecting method for electrical impedance detection based on measurement precision

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...

AI Technical Summary

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

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