Electrode-Skin contact impedance: In vivo measurements on an ovine model

Electrode-Skin contact impedance: In vivo measurements on an ovine model

The problem of electrical impedance between the skin and the electrode is an on-going challenge in bio-electronics. This is particularly true in the case of Electrical Impedance Tomography (EIT), which uses a large number of skin-contact electrodes and is very sensitive to noise. In the present article, contact impedance is measured and compared for a range of electrodes placed on the thorax of...

Signal Quality in Dry Electrode EEG and the Relation to Skin-electrode Contact Impedance Magnitude

Current EEG research approaches are focusing on developing new dry electrode EEG (electroencephalogram) systems providing a high enough signal quality for a wide range of applications. This study proposes several parameters for evaluating signal quality of dry electrodes and relates the results to skin-electrode contact impedance magnitude values. The EEG recordings of a Ag/AgCl pinned electrod...

Near infrared and skin impedance spectroscopic in vivo measurements on human skin Development of a diagnostic tool for skin cancer

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Skin-electrode impedance and its effect on recording cardiac potentials.

Electrode contact impedance sensitivity to variations in geometry.

Electrode contact impedance is a crucial factor in physiological measurements and can be an accuracy-limiting factor when performing electroencephalography and electrical impedance tomography. In this work, standard flat electrodes and micromachined multipoint spiked electrodes are characterized with a finite-element method electromagnetic solver and the dependence of the contact impedance on g...