Current injection electrodes for electrical impedance tomography

Physiological Measurement
S Armstrong, D Jennings

Abstract

Current conveyors have been identified as a possible component within the current injection electrodes of an electrical impedance tomography system, where accurate current generation or precise measurement of the current injected is required. Several circuit configurations have been investigated through simulation to determine the most suitable to meet the specifications of the EIT system. A bipolar (floating source) circuit configuration employing the use of current conveyors has been designed, which achieves greater than 12 mA output current without saturation, over an accepted body impedance range. Simulations were performed over frequencies in excess of 1 MHz, and the output phase shift was less than 0.15 degrees up to 250 kHz, and 0.6 degrees up to 1 MHz.

References

Nov 1, 1995·Medical & Biological Engineering & Computing·P J RiuR Pallàs-Areny
Sep 14, 2000·Medical & Biological Engineering & Computing·R KleffelD Jennings
Jul 24, 2001·Medical & Biological Engineering & Computing·D Jennings, I D Schneider

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Citations

Jul 4, 2012·Glycobiology·Rosanna E RamhorstGabriel A Rabinovich
May 5, 2006·Biomedical Engineering Online·Manuchehr Soleimani

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