An active electrode for mixed measurement techniques, with application to EIT

Adam Bujnowski, Jerzy Wtorek, Bart Truyen

Research output: Chapter in Book/Report/Conference proceedingConference paper

Abstract

The electronic design of an active electrode for differential measurements in EIT is presented. EIT allows visualisation of the distribution of electrical properties within a body, based on the measurement and application of current or voltage patterns [2,3]. Besides the use of active electrodes [1,4,5], differential two-frequency imaging is often explored to improve system performance. In this type of imaging, data is gathered mainly sequentially, with the measured signals being converted into digital form, and subsequently subtracted. The resolution of the sequential measurement procedure, however, suffers from the finite digital word length. To avoid this limitation, an analogue subtraction of simultaneous measurements at two frequencies is proposed. The measurement properties of such a design are considered in this paper.
Original languageEnglish
Title of host publicationProceedings EMBEC'02, 2nd European Medical & Biological Engineering Conference
EditorsHelmut Hutten
Place of PublicationGraz, Austria
PublisherTechnischen Universitat Graz
Publication statusPublished - 4 Dec 2002
EventEMBEC'02, 2nd European Medical & Biological Engineering Conference - Vienna, Austria
Duration: 4 Dec 20028 Dec 2002

Publication series

NameIFMBE proceedings
PublisherInternational Federation for Medical Electronics and Biological Engineering

Conference

ConferenceEMBEC'02, 2nd European Medical & Biological Engineering Conference
CountryAustria
CityVienna
Period4/12/028/12/02

Keywords

  • Electrical Impedance Tomography
  • active electrode

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