Design and calibration of a compact multi-frequency EIT system for acute stroke imaging

Physiological Measurement
A McEwanDavid S Holder

Abstract

A new, compact UCLH Mk 2.5 EIT system has been developed and calibrated for EIT imaging of the head. Improvements include increased input and output impedances, increased bandwidth and improved CMRR (80 dB) and linearity over frequencies and load (0.2% on a single channel, +/-0.7% on a saline tank over 20 Hz-256 kHz and 10-65 Omega). The accuracy of the system is sufficient to image severe acute stroke according to the specification from recent detailed anatomical modelling (Horesh et al 2005 3rd European Medical and Biological Engineering Conference EMBEC'05). A preliminary human study has validated the main specifications of the modelling, the range of trans-impedance from the head (8-70 Omega) using a 32 electrode, 258 combination protocol and contact impedances of 300 Omega to 2.7 kOmega over 20 Hz to 256 kHz.

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Citations

Jul 17, 2008·Annals of Biomedical Engineering·Mehran GoharianGerald R Moran
Feb 16, 2008·International Journal of Biomedical Imaging·Yair GranotBoris Rubinsky
Oct 15, 2013·IEEE Transactions on Medical Imaging·Emma MaloneSimon Arridge
Apr 1, 2014·IEEE Transactions on Biomedical Circuits and Systems·Hun WiTong In Oh
Oct 1, 2009·IEEE Transactions on Biomedical Circuits and Systems·A McEwanD S Holder
Jun 24, 2010·IEEE Transactions on Medical Imaging·Bastian HarrachEung Je Woo
Mar 30, 2017·Physiological Measurement·Mayo FaulknerDavid Holder
Jan 30, 2018·IEEE Transactions on Biomedical Circuits and Systems·Mohammad TakhtiKofi Odame
Apr 26, 2006·Physiological Measurement·A RomsauerovaD S Holder
May 2, 2007·Physiological Measurement·Mehran GoharianGerald R Moran
Aug 1, 2007·Physiological Measurement·A McEwanD S Holder
Aug 1, 2007·Physiological Measurement·Tong In OhDavid Holder
Jun 12, 2008·Physiological Measurement·G HahnG Hellige
Jul 22, 2010·Physiological Measurement·Naimul IslamAdrian Wilson
Aug 30, 2012·The Analyst·Richard Bayford, Andrew Tizzard
May 27, 2015·Physiological Measurement·Zhou ZhouDavid S Holder
May 21, 2016·Physiological Measurement·Markus Jehl, David Holder
May 21, 2016·Physiological Measurement·Markus JehlDavid Holder
Sep 23, 2014·Physiological Measurement·Weida Zhang, David Li
Aug 8, 2015·Physiological Measurement·Zhou ZhouDavid Holder
Sep 16, 2020·Sensors·Juliana Padilha Leitzke, Hubert Zangl
Apr 15, 2014·Journal of Physics. Conference Series·S KhanRyan Halter
Feb 7, 2018·Physiological Measurement·Jakob OrschulikMarian Walter
Sep 3, 2017·The Review of Scientific Instruments·Yunjie Yang, Jiabin Jia
Jun 6, 2009·Physiological Measurement·Nicolas RobitailleHervé Gagnon
Jun 6, 2009·Physiological Measurement·L FabriziD S Holder
Dec 31, 2018·Journal of Electrical Bioimpedance·M AminiH Kalvøy
Dec 17, 2021·Physiological Measurement·Enrico RavagliKirill Aristovich

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