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Metasurface-Enhanced Antennas for Microwave Brain Imaging.

Eleonora Razzicchia¹, Pan Lu¹, Wei Guo¹

¹Faculty of Natural and Mathematical Sciences, King's College London, Strand, London WC2R 2LS, UK.

Diagnostics (Basel, Switzerland)

|April 3, 2021

Summary

This summary is machine-generated.

Metasurface (MTS) enhanced antennas improve microwave imaging (MWI) for detecting brain strokes. This technology offers better signal transmission and image quality for earlier stroke diagnosis, potentially increasing survival rates.

Keywords:

brain imaging enhanced-antenna metasurface (MTS)microwave imaging (MWI)microwave tomography (MWT)

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Area of Science:

Biomedical Engineering
Electromagnetics
Medical Imaging

Background:

Stroke is a leading cause of death and disability, necessitating early and accurate diagnosis.
Microwave imaging (MWI) offers a non-invasive, non-ionizing approach for brain stroke detection.
Enhancing MWI systems is crucial for improving diagnostic capabilities and patient outcomes.

Purpose of the Study:

To investigate the feasibility of using metasurface (MTS) loaded antennas to enhance MWI for stroke detection.
To evaluate the performance improvement of MWI systems with MTS-enhanced antennas.
To compare different MWI system configurations using MTS technology.

Main Methods:

Experimental measurements using MTS-enhanced antennas in a brain-mimicking gel phantom for haemorrhagic and ischaemic stroke targets.
Analysis of transmission/reflection parameters and reconstructed images from MWI prototypes.
Simulation studies comparing a standard MWI system with MTS-enhanced antenna systems operating in air.

Main Results:

MTS loading significantly improved signal transmission (several dB) and image quality in experimental setups.
MTS superstrate enhanced antenna return loss by approximately 5 dB and increased signal difference by up to 25 dB in simulations.
MTS-enhanced MWI systems demonstrated more accurate reconstructions compared to conventional systems.

Conclusions:

Metasurface structures represent a significant hardware advancement for MWI scanners.
MTS technology can lead to more functional and ergonomic MWI systems for stroke detection.
This approach holds promise for improving early diagnosis and management of brain strokes.