Analysis of resting noise characteristics of three EIT systems in order to compare suitability for time difference imaging with scalp electrodes during epileptic seizures
作者： L Fabrizi , A McEwan , E Woo , D S Holder
DOI: 10.1088/0967-3334/28/7/S16
关键词: Epileptic seizure 、 Imaging phantom 、 Noise 、 Biomedical engineering 、 Input impedance 、 Materials science 、 Human head 、 Multiplexer 、 Electrical impedance tomography 、 Resistor 、 Biophysics 、 Physiology (medical) 、 Physiology
摘要: Electrical impedance tomography measurements in clinical applications are limited by an undesired noise component. We have investigated the three systems suitable for imaging epileptic seizures, UCH Mark1b, Mark2.5 and KHU Mark1 16 channel, at applied frequencies steps from 1 to 100 kHz, varying load impedance, single terminal or multiplexed measurements, test objects of increasing complexity a resistor saline filled tank human volunteer. The was white, increased about 0.03% rms on 0.08% human; it with but independent use multiplexer. delivered best performance spectra 0.02%, which could be further reduced averaging level where reliable changes 0.1% estimated during seizures appears plausible.
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