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Blood flow imaging using electrical impedance tomography.

B H Brown1, A Leathard, A Sinton

  • 1Department of Medical Physics and Clinical Engineering, University of Sheffield, Royal Hallamshire Hospital, UK.

Clinical Physics and Physiological Measurement : an Official Journal of the Hospital Physicists' Association, Deutsche Gesellschaft Fur Medizinische Physik and the European Federation of Organisations for Medical Physics
|January 1, 1992
PubMed
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Real-time electrical impedance tomography (EIT) can visualize saline flow in human vasculature. This technology successfully images venous flow and cardiac chamber passage, aiding in vascular imaging applications.

Area of Science:

  • Biomedical Engineering
  • Medical Imaging

Background:

  • Electrical Impedance Tomography (EIT) is a non-invasive imaging technique.
  • Visualizing fluid dynamics within the human vascular system presents challenges.

Purpose of the Study:

  • To demonstrate the capability of real-time EIT for imaging saline flow in the human vascular system.
  • To validate EIT's sensitivity for tracking fluid dynamics in vivo.

Main Methods:

  • Utilized a real-time EIT system to monitor saline injections.
  • Conducted experiments in a cylindrical tank with conductive tubes to calibrate flow measurements.
  • Performed in vivo studies involving intravenous saline bolus injections.

Main Results:

  • Successfully imaged the flow of a saline bolus through the human venous system.

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  • Established a correlation between EIT-derived concentration-time curves and flow rates in a controlled setup.
  • Demonstrated EIT's sensitivity to track saline passage through cardiac chambers.

    • Conclusions:

    • Real-time EIT is a viable tool for imaging vascular fluid dynamics.
    • EIT offers sufficient sensitivity for observing physiological flow patterns, including venous and cardiac flows.