Radar based contact-free technology has number of potential applications for monitoring the cardiopulmonary functions of patients. However, no study has evaluated the effect of gender on the quality of the recordings. This study makes an attempt to distinguish radar based recording of male and female subjects. The study analysed a publicly available dataset of radar-recorded heart sound signals from both male and female subjects. Here, we exploit the reference signal-to-noise ratio (RSNR) to quantify the signal's quality. The results indicate that there is a significant difference in the signal quality between males and females, with males having a higher RSNR value compared to females. This could be a limitation in the widespread use of the current radar based cardiopulmonary recording techniques and overcoming this should be considered for future research.Clinical relevance- This work has highlighted the gender based difference. By considering this, the radar based cardiopulmonary device has the potential for being used for patients requiring long-term monitoring.
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http://dx.doi.org/10.1109/EMBC40787.2023.10340554 | DOI Listing |
Alzheimers Dement
December 2024
Bonn-Aachen International Center for IT (b-it), Bonn, Germany.
Background: Alzheimer's Disease (AD) is associated with sleep disturbances. Moreover, individuals with sleep disturbances have been reported to have a higher risk for developing AD. The measurement of sleep behavior therefore opens the opportunity for a potential digital biomarker of AD.
View Article and Find Full Text PDFBackground: The relationship between sleep and AD is unclear: sleep problems may contribute to AD pathogenesis, but the spreading of AD pathology across the brain may also de-regulate sleep. What aspect of sleep is relevant in which disease phase is also unclear, as many studies are based on questionnaires. We study sleep efficiency and rapid eye movement (REM) sleep, objectively measured using an activity tracker to shed light on sleep disturbances across the AD spectrum.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Bonn-Aachen International Center for IT (b-it), Bonn, Germany.
Background: Alzheimer's Disease (AD) is associated with sleep disturbances. Moreover, individuals with sleep disturbances have been reported to have a higher risk for developing AD. The measurement of sleep behavior therefore opens the opportunity for a potential digital biomarker of AD.
View Article and Find Full Text PDFRev Sci Instrum
January 2025
College of Public Health, Sichuan University, Chengdu 610041, China.
In this paper, a microwave thermal imaging system (MTIS) has been presented for debonding detection of radar absorbing materials (RAMs). First, an overview of the mechanism underlying microwave heating and the fundamental principle of defect detection within RAMs is presented. Then, a multifunctional MTIS capable of performing both microwave lock-in thermography (MLIT) and long-pulse microwave thermography (LPMT) has been introduced, specifically tailored for the in situ inspection of RAMs.
View Article and Find Full Text PDFSensors (Basel)
December 2024
School of Highway, Chang'an University, Middle Section of South Erhuan Road, Xi'an 710064, China.
Semi-rigid bases are widely used in road construction due to their excellent properties, high rigidity, and frost resistance, and they have been in service for many years. However, as the service life increases, the maintenance demands also grow, with traditional maintenance methods still being the primary approach. Based on a typical case using ground-penetrating radar (GPR) technology, this study explores the issue of cracks in semi-rigid bases and their impact on overlay layers.
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