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Related Experiment Videos

Design of an electrical impedance tomography phantom using active elements.

I D Schneider1, R Kleffel, D Jennings

  • 1Electronics Division, Cardiff School of Engineering, UK.

Medical & Biological Engineering & Computing
|September 14, 2000
PubMed
Summary
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A novel phantom for electrical impedance tomography (EIT) uses active elements for dynamic impedance control. This design aids EIT system validation while managing costs and complexity for future development.

Area of Science:

  • Biomedical Engineering
  • Electrical Engineering
  • Medical Imaging Technology

Background:

  • Electrical Impedance Tomography (EIT) requires robust validation methods.
  • Existing passive phantoms have limitations in dynamic impedance simulation.
  • Developing advanced phantoms is crucial for EIT system accuracy.

Purpose of the Study:

  • To propose a novel phantom architecture for Electrical Impedance Tomography (EIT).
  • To enable dynamic variation of impedance distribution within the phantom using computer control.
  • To facilitate the validation of EIT systems under test.

Main Methods:

  • Design incorporates active elements, specifically multiplying digital-to-analogue converters (MDACs).
  • Analysis of published passive phantom layouts to specify active element requirements.

Related Experiment Videos

  • Strategic placement of active elements in a restricted region to mitigate cost and complexity.

    • Main Results:

    • The proposed phantom architecture allows for computer-controlled dynamic impedance adjustments.
    • Cost and complexity are managed by limiting active elements to a specific phantom region.
    • Current technology limitations (MDAC analogue bandwidth) restrict full active element implementation.

    Conclusions:

    • The novel phantom design offers a cost-effective approach to dynamic impedance simulation for EIT validation.
    • The architecture supports future development towards a fully capable phantom across a 10 kHz to 1 MHz frequency range.
    • This research paves the way for more advanced EIT system testing and development.