An electrical impedance tomography microscope

H Griffiths, M G Tucker, J Sage, W G Herrenden-Harker

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    Abstract

    A circular array of 16 electrodes has been constructed for use as an electrical impedance tomography (EIT) microscope. The electrodes were made from 60 microns diameter gold wires anchored to a printed circuit board. The internal diameter of the array was 0.9 mm giving a theoretical spatial resolution of about 100 microns. For EIT imaging, the array was connected to an imaging system operating at 82 kHz. Static images of conducting and insulating filaments (cooper wire and human hair) in saline solution were obtained as well as dynamic imaging sequences of glass microspheres migrating through the array. The interelectrode impedance was typically 5 k omega and the transimpedances ranged from 14 to 210 omega.

    Original languageEnglish
    Pages (from-to)A15-A24
    Number of pages10
    JournalPhysiological Measurement
    Volume17
    Issue numberSuppl 4A
    DOIs
    Publication statusPublished - Nov 1996

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    Keywords

    • Electric Impedance
    • Electrodes
    • Electronics, Medical
    • Equipment Design
    • Hair
    • Humans
    • Image Processing, Computer-Assisted
    • Microscopy
    • Microspheres
    • Tomography
    • Journal Article

    Cite this

    Griffiths, H., Tucker, M. G., Sage, J., & Herrenden-Harker, W. G. (1996). An electrical impedance tomography microscope. Physiological Measurement, 17(Suppl 4A), A15-A24. https://doi.org/10.1088/0967-3334/17/4A/004