Non-contact and real-time measurement of heart rate and heart rate variability using microwave reflectometry

Mase, A.; Kogi, Y.; Maruyama, Toru; Tokuzawa, T.; Sakai, F.; Kunugita, M.; Koike, Takao; Hasegawa, Hiroyasu

doi:10.1063/1.5128959

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…Time-domain thermal cycling involves keeping the sample stationary during temperature changes. It includes contact heating [135][136][137][138][139][140][141], as well as noncontact heating methods such as infrared heating [142], laser heating [143] and microwave heating [144].…”

Section: Time-domain-based Thermal Cyclingmentioning

confidence: 99%

Advances in Simple, Rapid, and Contamination-Free Instantaneous Nucleic Acid Devices for Pathogen Detection

Wang,

Zhou

et al. 2023

Biosensors

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Pathogenic pathogens invade the human body through various pathways, causing damage to host cells, tissues, and their functions, ultimately leading to the development of diseases and posing a threat to human health. The rapid and accurate detection of pathogenic pathogens in humans is crucial and pressing. Nucleic acid detection offers advantages such as higher sensitivity, accuracy, and specificity compared to antibody and antigen detection methods. However, conventional nucleic acid testing is time-consuming, labor-intensive, and requires sophisticated equipment and specialized medical personnel. Therefore, this review focuses on advanced nucleic acid testing systems that aim to address the issues of testing time, portability, degree of automation, and cross-contamination. These systems include extraction-free rapid nucleic acid testing, fully automated extraction, amplification, and detection, as well as fully enclosed testing and commercial nucleic acid testing equipment. Additionally, the biochemical methods used for extraction, amplification, and detection in nucleic acid testing are briefly described. We hope that this review will inspire further research and the development of more suitable extraction-free reagents and fully automated testing devices for rapid, point-of-care diagnostics.

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Section: Time-domain-based Thermal Cyclingmentioning

confidence: 99%

Advances in Simple, Rapid, and Contamination-Free Instantaneous Nucleic Acid Devices for Pathogen Detection

Wang,

Zhou

et al. 2023

Biosensors

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“…Electromagnetic waves as a different modality has been proposed for many medical sensing and imaging applications [12,[19][20][21][22][23][24]. Most of these researches are planned in the low microwave band, i.e., 1 GHz-4 GHz.…”

Section: Introductionmentioning

confidence: 99%

Experimental Feasibility Study of Using Mmwave for Arterial Radial Displacement Monitoring

Chamaani¹,

Slanina²,

Nguyen³

et al. 2022

PIER M

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Doppler Ultrasound as the gold standard for noninvasive arterial pulsation monitoring has limitations such as dependency on the operator and absence of acoustic window in some patients. Recently, mm-wave has been propounded as an alternative modality for biomedical diagnostics. However, heartbeat monitoring using mm-wave modality has been experimentally investigated only for external carotid artery, and its usage for deeper arteries has not been proved, yet. This study investigates the feasibility of mm-waves in the monitoring of non-superficial arteries. A continuous-wave (CW) reflectometer sensor is used for sensing pulsations exploiting the Doppler effect. The artery mimicking tube passes through an artificial agar-oil skin phantom. A peristaltic pump circulates the liquid through a tube. An antenna is placed in direct contact with the phantom without any coupling liquid. First, we investigate the optimum frequency of the given antenna in its impedance bandwidth [16][17][18][19][20]. Using the optimum frequency, the pulsation of an artery with a 1.6 mm diameter, placed in the depth of 16 mm, and has less than 0.02 mm radial oscillation amplitude was easily detectable.

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Illumination variation-resistant video-based heart rate monitoring using LAB color space

Zhang

Dong

Zhang

et al. 2021

Optics and Lasers in Engineering

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Non-contact and real-time measurement of heart rate and heart rate variability using microwave reflectometry

Cited by 4 publications

References 27 publications

Advances in Simple, Rapid, and Contamination-Free Instantaneous Nucleic Acid Devices for Pathogen Detection

Advances in Simple, Rapid, and Contamination-Free Instantaneous Nucleic Acid Devices for Pathogen Detection

Experimental Feasibility Study of Using Mmwave for Arterial Radial Displacement Monitoring

Illumination variation-resistant video-based heart rate monitoring using LAB color space

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