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Related Experiment Videos

Electrical impedance tomography. Electrode current determination from programmable voltage sources.

F J Lidgey1, Q S Zhu, C N McLeod

  • 1Electrical Impedance Tomography Research Group, Oxford Polytechnic, Headington, 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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New electrical impedance tomography (EIT) systems use a voltage-drive architecture to overcome limitations in current sources. This approach enables precise adaptive current patterns for improved EIT accuracy.

Area of Science:

  • Biomedical Engineering
  • Electrical Engineering
  • Medical Imaging

Background:

  • Adaptive current electrical impedance tomography (EIT) demands high accuracy beyond current source capabilities.
  • Existing EIT systems face limitations in achieving precise adaptive current control.

Purpose of the Study:

  • To introduce a novel EIT system architecture for enhanced current control.
  • To address the accuracy limitations of conventional current sources in adaptive EIT.

Main Methods:

  • Developed a voltage-drive EIT system architecture.
  • Utilized a numerically inverted admittance matrix for indirect current setting.
  • Employed programmable voltage sources to achieve target current patterns.

Main Results:

Related Experiment Videos

  • Successfully demonstrated an indirect method for setting electrode currents in EIT.
  • Achieved desired adaptive current patterns using the novel voltage-drive approach.
  • Overcame the accuracy limitations of traditional current sources.

Conclusions:

  • The proposed voltage-drive architecture is effective for adaptive EIT.
  • This method provides a viable solution for achieving high-accuracy current control in EIT measurements.
  • The findings pave the way for more precise EIT applications.