This paper summarizes the development and the experimental testing of a scanning device, in the microwave range, to monitor brain stroke. The device comprehends 4 main sections: a sensors helmet, a switching matrix, a data acquisition part, and a control/processing core. The sensors in the helmet are 22 custom-made flexible antennas working around 1 GHz, placed conformally to the upper head part. A first validation of the system consists in the detection of a target in the head region. Experimental testing is performed on a single-cavity head phantom, while the target is a balloon mimicking the stroke. The shape of the balloon and phantom are extracted from medical images, and tissues properties are emulated with liquids that resemble their dielectric properties. A differential measurement approach senses the field on the antennas in two different situations, and from their difference computes a 3-D image through a singular value decomposition of the discretized scattering operator obtained from an accurate numerical model. The results verify the capabilities of the system on detecting and monitoring stroke evolution.

Microwave imaging device prototype for brain stroke 3D monitoring / Tobon Vasquez, J. A.; Rodriguez-Duarte, D. O.; Origlia, C.; Turvani, G.; Scapaticci, R.; Casu, M. R.; Crocco, L.; Vipiana, F.. - ELETTRONICO. - (2022), pp. 200-202. (Intervento presentato al convegno 2022 International Workshop on Antenna Technology (iWAT) tenutosi a Dublin, Ireland nel 16-18 May 2022) [10.1109/iWAT54881.2022.9810905].

Microwave imaging device prototype for brain stroke 3D monitoring

Tobon Vasquez J. A.;Rodriguez-Duarte D. O.;Origlia C.;Turvani G.;Casu M. R.;Crocco L.;Vipiana F.
2022

Abstract

This paper summarizes the development and the experimental testing of a scanning device, in the microwave range, to monitor brain stroke. The device comprehends 4 main sections: a sensors helmet, a switching matrix, a data acquisition part, and a control/processing core. The sensors in the helmet are 22 custom-made flexible antennas working around 1 GHz, placed conformally to the upper head part. A first validation of the system consists in the detection of a target in the head region. Experimental testing is performed on a single-cavity head phantom, while the target is a balloon mimicking the stroke. The shape of the balloon and phantom are extracted from medical images, and tissues properties are emulated with liquids that resemble their dielectric properties. A differential measurement approach senses the field on the antennas in two different situations, and from their difference computes a 3-D image through a singular value decomposition of the discretized scattering operator obtained from an accurate numerical model. The results verify the capabilities of the system on detecting and monitoring stroke evolution.
2022
978-1-6654-9449-6
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2981767