A stroke detection and discrimination framework using broadband microwave scattering on stochastic models with deep learning

• Published in: Scientific reports Vol. 11; no. 1; pp. 24222 - 9
• Main Authors: Alon, Leeor, Dehkharghani, Seena
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 20.12.2021; Nature Publishing Group; Nature Portfolio
• Subjects: 631/1647/1888; 631/1647/245; 639/166/987; Algorithms; Antennas; Area Under Curve; Brain - diagnostic imaging; Classification; Computer Simulation; Deep Learning; Diagnosis, Computer-Assisted - methods; Dielectric properties; Disease; Electromagnetic Fields; Electromagnetism; Head - diagnostic imaging; Hemorrhage; Hemorrhagic Stroke - diagnostic imaging; Humanities and Social Sciences; Humans; Localization; Magnetic resonance imaging; Microwaves; multidisciplinary; Neural networks; Neural Networks, Computer; Noise; Normal Distribution; Public health; Reproducibility of Results; ROC Curve; Scattering, Radiation; Science; Science (multidisciplinary); Simulation; Software; Stochastic models; Stochastic Processes; Stroke
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-021-03043-y

Stroke poses an immense public health burden and remains among the primary causes of death and disability worldwide. Emergent therapy is often precluded by late or indeterminate times of onset before initial clinical presentation. Rapid, mobile, safe and low-cost stroke detection technology remains a deeply unmet clinical need. Past studies have explored the use of microwave and other small form-factor strategies for rapid stroke detection; however, widespread clinical adoption remains unrealized. Here, we investigated the use of microwave scattering perturbations from ultra wide-band antenna arrays to learn dielectric signatures of disease. Two deep neural networks (DNNs) were used for: (1) stroke detection (“classification network”), and (2) characterization of the hemorrhage location and size (“discrimination network”). Dielectric signatures were learned on a simulated cohort of 666 hemorrhagic stroke and control subjects using 2D stochastic head models. The classification network yielded a stratified K-fold stroke detection accuracy > 94% with an AUC of 0.996, while the discrimination network resulted in a mean squared error of < 0.004 cm and < 0.02 cm, for the stroke localization and size estimation, respectively. We report a novel approach to intelligent diagnostics using microwave wide-band scattering information thus circumventing conventional image-formation.