Electrode circuits for frequency- and code-division multiplexed impedance tomography

A. McEwan, Jonathan Tapson, A. Van Schaik, D. S. Holder

Research output: Chapter in Book / Conference PaperConference Paperpeer-review

6 Citations (Scopus)

Abstract

Traditional impedance tomography measurement systems make sequential four-terminal impedance measurements. Potentially faster frequency- and code-division multiplexed impedance measurement systems require that simultaneous current injection and voltage measurement take place at all terminals, making four-terminal measurements difficult. We describe an electrode interface circuit that simultaneously implements balanced current injection, and current and potential measurement, allowing four-terminal measurements on sets of multiple electrodes using these faster techniques. Circuit results show that accurate simultaneous four-terminal measurements are possible, thereby enabling faster impedance tomography systems.

Original languageEnglish
Title of host publicationConference Proceedings - IEEE Biomedical Circuits and Systems Conference Healthcare Technology, BiOCAS2007
Pages130-133
Number of pages4
DOIs
Publication statusPublished - 2007
Externally publishedYes
EventIEEE Biomedical Circuits and Systems Conference Healthcare Technology, BiOCAS2007 - Montreal, QC, Canada
Duration: 27 Nov 200730 Nov 2007

Publication series

NameConference Proceedings - IEEE Biomedical Circuits and Systems Conference Healthcare Technology, BiOCAS2007

Conference

ConferenceIEEE Biomedical Circuits and Systems Conference Healthcare Technology, BiOCAS2007
Country/TerritoryCanada
CityMontreal, QC
Period27/11/0730/11/07

Keywords

  • Bioimpedance
  • Electrical impedance spectroscopy
  • Electrical impedance tomography
  • Resistometry

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