Why the study?
To develop and evaluate a method to determine filter parameters for the topology method, enabling noncontact radar measurement of heart inter-beat intervals while eliminating respiratory components.
Does noncontact measurement using millimeter-wave radar with topology method accurately measure heart inter-beat intervals compared to contact-type ECG in humans and chimpanzees?
Does noncontact measurement using millimeter-wave radar with topology method accurately measure heart inter-beat intervals compared to contact-type ECG in humans and chimpanzees?
Millimeter-wave radar using a topology method can accurately measure heart inter-beat intervals in humans and chimpanzees without physical contact.
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May enhance radar-based noncontact IBI accuracy; leaves open clinical validation in humans.
This study proposes a method to determine the filter parameters required for the topology method, which is a radar-based noncontact method for measurement of heart inter-beat intervals. The effectiveness of the proposed method is evaluated by performing radar measurements involving both human participants and chimpanzee subjects. The proposed method is designed to enable setting of the filter cutoff frequency to eliminate respiratory components while maintaining the higher harmonics of the heartbeat components. Measurements using a millimeter-wave radar system and a reference contact -type electrocardiogram sensor demonstrate that the smallest errors that occur when measuring heart inter-beat intervals using the proposed method can be as small as 4.43 and 2.55 ms for humans and chimpanzees, respectively. These results indicate the possibility of using noncontact physiological measurements to monitor both humans and chimpanzees.
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Iwata et al. (2023) studied this question.
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