This work focuses on brain stroke imaging via microwave technology. In particular,\nthe open issue of monitoring patients after stroke onset is addressed here in order to provide clinicians\nwith a tool to control the effectiveness of administered therapies during the follow-up period. In this\npaper, a novel prototype is presented and characterized. The device is based on a low-complexity\narchitecture which makes use of a minimum number of properly positioned and designed antennas\nplaced on a helmet. It exploits a differential imaging approach and provides 3D images of the\nstroke. Preliminary experiments involving a 3D phantom filled with brain tissue-mimicking\nliquid confirm the potential of the technology in imaging a spherical target mimicking a stroke\nof a radius equal to 1.25 cm.
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