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Related Experiment Videos

Experimental acquisition system for impedance tomography with active electrode approach

B Rigaud1, Y Shi, N Chauveau

  • 1INSERM-U305, Hôtel Dieu, Toulouse, France.

Medical & Biological Engineering & Computing
|November 1, 1993
PubMed
Summary

A new experimental impedance tomography system was built using 16 active electrodes. This system successfully imaged impedance targets in a liquid phantom, demonstrating its practical application in electrical impedance tomography.

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Area of Science:

  • Electrical Engineering
  • Biomedical Imaging
  • Applied Physics

Background:

  • Impedance tomography (IT) is a non-invasive imaging technique.
  • Accurate IT systems require sophisticated acquisition hardware.
  • Characterizing system performance is crucial for reliable imaging.

Purpose of the Study:

  • To construct and evaluate an experimental impedance tomography system.
  • To assess the system's capability in imaging complex impedance targets.
  • To compare the system's performance against established benchmarks.

Main Methods:

  • Developed an acquisition system with 16 multifunctional active electrodes.
  • Each electrode integrates a current source and voltage buffer.
  • Utilized a liquid-filled phantom with varying target impedances for imaging.

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  • Determined system performance using modulation transfer function analysis.

    • Main Results:

    • Successfully constructed an experimental impedance tomography system.
    • Obtained images of both active and reactive components of target impedances.
    • Demonstrated the system's ability to image targets within a liquid phantom.
    • Performance comparison metrics were established using standard phantoms.

    Conclusions:

    • The developed impedance tomography system is functional and capable of imaging complex impedance variations.
    • The system's design with integrated current sources and voltage buffers facilitates accurate data acquisition.
    • Further validation and comparison confirm its potential for practical IT applications.