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Related Experiment Videos

Electrical impedance tomography system: an open access circuit design.

Manuchehr Soleimani1

  • 1William Lee Innovation Centre, School of Materials, The University of Manchester, Manchester M60 1QD, UK. M.Soleimani@manchester.ac.uk

Biomedical Engineering Online
|May 5, 2006
PubMed
Summary

This study presents a low-cost, efficient 2-D electrical impedance tomography (EIT) system. Dynamic mode operation yielded superior results for electrical conductivity imaging.

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Area of Science:

  • Biomedical Engineering
  • Electrical Engineering
  • Medical Imaging

Background:

  • Development of a simple, cost-effective 2-D Electrical Impedance Tomography (EIT) system.
  • System designed and implemented at Sharif University of Technology for an MSc project.

Purpose of the Study:

  • To report the design and performance of a novel EIT system.
  • To provide open access to the design details of the developed EIT system.

Main Methods:

  • System comprises a PC with an I/O card, current generator, multiplexer, power supply, and electrode array phantom.
  • Utilizes 12-bit accuracy data acquisition with synchronous phase detection for voltage measurement.
  • Employs various image reconstruction algorithms for generating electrical conductivity images.

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Main Results:

  • Simulation and real measurement data presented for system validation.
  • Reconstruction software developed in MATLAB; data acquisition software in C++.
  • Dynamic mode operation demonstrated improved performance over static mode due to error cancellation.

Conclusions:

  • The developed EIT system is efficient and low-cost.
  • Design details are made available for open access publication.
  • The system is capable of generating electrical conductivity images in 2-D.