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Monitoring Lung Function with Electrical Impedance Tomography in the Intensive Care Unit
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Published on: September 6, 2024

A 128-electrode three dimensional electrical impedance tomography system.

Guizhi Xu1, Renping Wang, Shuai Zhang

  • 1Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology, Tianjin 300130, P.R.China. gzxu@hebut.edu.cn

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|November 16, 2007
PubMed
Summary

This study introduces a novel 128-electrode Electrical Impedance Tomography (EIT) system for 3D imaging of thoracic impedance changes. Preliminary tests confirm the system's feasibility for functional imaging applications.

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Area of Science:

  • Biomedical Engineering
  • Medical Imaging
  • Electrical Engineering

Background:

  • Electrical Impedance Tomography (EIT) is an emerging functional imaging modality.
  • Accurate impedance change detection is crucial for medical diagnostics.
  • Existing EIT systems face limitations in electrode count and imaging resolution.

Purpose of the Study:

  • To develop and validate a new 128-electrode EIT system for high-resolution 3D imaging of the human thorax.
  • To assess the system's capability for detecting impedance variations.
  • To demonstrate the feasibility of the developed EIT system for functional imaging.

Main Methods:

  • Development of a multi-frequency EIT system with 128 electrodes (64 driving, 64 measuring) arranged in four planes.
  • Utilized a high-speed digital signal processor (DSP) for system control and signal processing.
  • Tested the system using a cylindrical phantom with saline solution and objects of varying conductivities.

Main Results:

  • Successfully developed and assembled a 128-electrode EIT system.
  • Demonstrated the system's ability to detect impedance changes within a phantom.
  • Preliminary experiments confirmed the feasibility of 3D thoracic imaging using the developed EIT system.

Conclusions:

  • The novel 128-electrode EIT system shows promise for advanced functional imaging of the thorax.
  • The system's design and preliminary performance indicate its potential for clinical applications.
  • Further research and validation are warranted to fully explore its diagnostic capabilities.