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Flexible Electromagnetic Cap for Head Imaging.

Abdulrahman S M Alqadami, Adnan Trakic, Anthony E Stancombe

    IEEE Transactions on Biomedical Circuits and Systems
    |September 21, 2020
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a flexible, wearable electromagnetic imaging system for brain stroke detection. The novel cap-based design offers a lightweight and compact solution for improved preclinical stroke diagnostics.

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    Area of Science:

    • Biomedical Engineering
    • Medical Imaging
    • Electromagnetics

    Background:

    • Existing brain imaging systems for stroke detection are often bulky, rigid, and complex.
    • There is a need for portable, user-friendly, and effective imaging solutions for early stroke diagnosis.

    Purpose of the Study:

    • To develop a wideband wearable electromagnetic (EM) head imaging system for brain stroke detection.
    • To overcome the limitations of size, rigidity, and complexity associated with current systems.

    Main Methods:

    • Integration of a 16-element antenna array into a flexible, custom-made wearable cap using room-temperature-vulcanizing (RTV) silicone.
    • Incorporation of a flexible high-permittivity matching layer to address skin-antenna array impedance mismatch.
    • Utilization of compact antennas with wideband frequency operation (0.6-2.5 GHz), low signal distortion, safe Specific Absorption Rate (SAR) values, and unidirectional radiation.

    Main Results:

    • Experimental validation on realistic head phantoms demonstrated system feasibility.
    • The polar sensitivity encoding (PSE) algorithm successfully generated 2D images.
    • Images of a stroke-like target within phantoms confirmed the system's potential for detecting abnormalities.

    Conclusions:

    • The developed wearable EM head imaging system is lightweight, compact, and flexible.
    • The system shows significant promise for preclinical trials in brain stroke detection.
    • This technology offers a viable alternative for non-invasive, early-stage stroke diagnosis.