On the matching medium for microwave stroke diagnosis
Journal article, 2019

The choice of matching medium can directly affect the amount of power transmitted into and through human bodies, which impacts on the quality of the reconstructed images in microwave-based medical imaging, and thus the diagnosis accuracies. In this paper, the amount of the transmitted and reflected power of multi-layer planar healthy and hemorrhagic stroke brain models under different choices of matching medium are determined. These multi-layer planar brain tissue models are made up of at least 17 tissue layers with realistic dielectric properties. A layer of blood with different thickness is introduced to model the case of hemorrhagic stroke. Our results show that matching medium with low relative permittivity provides better intrinsic contrast between healthy brain and hemorrhagic brain. Analysis on how the reflection coefficient and transmittance vary under different matching medium are included to provide better insights to the findings.

stroke diagnosis

biomedical electromagnetics

matching medium

microwave brain imaging

biomedical imaging


Hoi-Shun Lui

University of Queensland

Andreas Fhager

Chalmers, Electrical Engineering, Signalbehandling och medicinsk teknik, Biomedical Electromagnetics

Biomedical Physics and Engineering Express

2057-1976 (eISSN)

Vol. 5 4 045020

Subject Categories

Medical Laboratory and Measurements Technologies

Other Medical Engineering

Medical Image Processing



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