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Are patient specific meshes required for EIT head imaging?

Markus Jehl1, Kirill Aristovich, Mayo Faulkner

  • 1University College London, London WC1E 6BT, UK.

Physiological Measurement
|May 21, 2016
PubMed
Summary
This summary is machine-generated.

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A precise head mesh is not essential for electrical impedance tomography (EIT) stroke detection. A generic head model is sufficient for monitoring patients for secondary strokes after head trauma.

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Computational Modeling

Background:

  • Time-differential measurements in head electrical impedance tomography (EIT) minimize modeling errors.
  • Previous studies indicate improved head models enhance EIT image quality, but the necessary accuracy remains unquantified.

Purpose of the Study:

  • To develop a novel pipeline for creating accurate head meshes using MRI and CT scans.
  • To analyze the impact of head model accuracy on EIT imaging for stroke detection.

Main Methods:

  • A new pipeline generated precise head meshes from MRI and CT scans for four individuals.
  • Simulated voltage data for hemorrhage and ischemia perturbations under varying noise levels and positions were analyzed.
  • Statistical analysis compared reconstructions using correct versus generic head meshes.

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Main Results:

  • Reconstructions using the correct head mesh showed a 25% improvement on average compared to other meshes.
  • Despite improved reconstructions, stroke detection rates did not significantly increase.

Conclusions:

  • A generic head mesh is adequate for monitoring patients for secondary strokes post-head trauma.
  • Highly accurate, patient-specific head models may not be necessary for clinical EIT stroke detection.