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Fig. 3 | BioMedical Engineering OnLine

Fig. 3

From: Optimal combination of electrodes and conductive gels for brain electrical impedance tomography

Fig. 3

a Normalized contact impedance of all electrode–conductive gel combinations measured at 1 kHz. b Normalized mean change in contact impedance of all combinations with time measured for 1 h at 1 kHz. c Mean change in contact impedance of all combinations during each sub-time frame. d Score of all combinations with regard to the time property of contact impedance,*p < 0.05

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