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Realistic 2D human thorax modelling for EIT.

A Borsic1, C McLeod, W Lionheart

  • 1School Of Engineering, Oxford Brookes University, UK. aborsic@brookes.ac.uk

Physiological Measurement
|March 10, 2001
PubMed
Summary
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Electrical impedance tomography (EIT) uses boundary measurements to estimate resistivity. This study presents a realistic 2D thoracic model, improving accuracy over circular models for better EIT imaging.

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Electrical Engineering

Background:

  • Electrical impedance tomography (EIT) estimates internal resistivity using boundary measurements.
  • EIT image quality is sensitive to boundary errors and requires accurate forward modeling.
  • Traditional EIT models often use simplified circular geometries.

Purpose of the Study:

  • To develop and evaluate a realistic 2D thoracic model for improved EIT reconstruction.
  • To compare the accuracy of different mesh discretizations in a realistic thoracic model.
  • To determine optimal mesh density for 2D EIT problems.

Main Methods:

  • Realization of a 2D realistic thoracic phantom model.
  • Implementation of a complete electrode model forward solver.

Related Experiment Videos

  • Comparison of various mesh discretizations for accuracy assessment.

    • Main Results:

    • The realistic 2D thoracic model provides a more accurate representation than circular models.
    • Different mesh densities show varying levels of accuracy in forward solutions.
    • Specific mesh densities are identified as suitable for the 2D EIT problem.

    Conclusions:

    • Realistic thoracic models enhance the accuracy of EIT reconstructions.
    • Mesh density selection is crucial for optimizing 2D EIT performance.
    • This work provides a foundation for more precise EIT imaging of the thorax.