An electrical impedance tomography microscope

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

doi:10.1088/0967-3334/17/4A/004

An electrical impedance tomography microscope

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

University Hospital of Wales

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

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 language	English
Pages (from-to)	A15-A24
Number of pages	10
Journal	Physiological Measurement
Volume	17
Issue number	Suppl 4A
DOIs	https://doi.org/10.1088/0967-3334/17/4A/004
Publication status	Published - Nov 1996

Keywords

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

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10.1088/0967-3334/17/4A/004

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title = "An electrical impedance tomography microscope",

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.",

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

author = "H Griffiths and Tucker, {M G} and J Sage and Herrenden-Harker, {W G}",

year = "1996",

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T1 - An electrical impedance tomography microscope

AU - Griffiths, H

AU - Tucker, M G

AU - Sage, J

AU - Herrenden-Harker, W G

PY - 1996/11

Y1 - 1996/11

N2 - 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.

AB - 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.

KW - Electric Impedance

KW - Electrodes

KW - Electronics, Medical

KW - Equipment Design

KW - Hair

KW - Humans

KW - Image Processing, Computer-Assisted

KW - Microscopy

KW - Microspheres

KW - Tomography

KW - Journal Article

U2 - 10.1088/0967-3334/17/4A/004

DO - 10.1088/0967-3334/17/4A/004

M3 - Article

C2 - 9001598

SN - 0967-3334

VL - 17

SP - A15-A24

JO - Physiological Measurement

JF - Physiological Measurement

IS - Suppl 4A

ER -

An electrical impedance tomography microscope

Abstract

Keywords

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