Comparison of the impedance cardiogram with continuous wave radar using body-contact antennas
| Autor: | Rahul Dugar, Jean-Michel Redoute, Mehmet Rasit Yuce, Dilpreet Buxi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Male
Acoustics 01 natural sciences Signal law.invention 03 medical and health sciences Electrocardiography 0302 clinical medicine law Electronic engineering Electric Impedance Humans Radar Electrical impedance Second derivative Physics Signal processing 010401 analytical chemistry Reproducibility of Results Signal Processing Computer-Assisted 0104 chemical sciences Continuous-wave radar Feature (computer vision) Continuous wave 030217 neurology & neurosurgery |
| Zdroj: | EMBC |
| ISSN: | 2694-0604 |
| Popis: | This paper describes a continuous wave (CW) radar system with body-contact antennas and basic signal processing. The goal is to assess the signals' reproducibility across different subjects as well as a respiration cycle. Radar signals using body-contact antennas with a carrier frequency of 868 MHz are used to acquire the cardiac activity at the sternum. The radar I and Q channel signals are combined to form their magnitude. Signals are collected from six healthy males during paced breathing conditions. The electrocardiogram (ECG) and impedance cardiogram (ICG) signals are acquired simultaneously as reference. The chosen feature in the radar signal is the maximum of its second derivative, which is closest to the ICG B-point. The median and mean absolute errors in pre-ejection period (PEP) in milliseconds between the ICG's B-point and chosen feature in the radar signal range from −6–119.7 ms and 7.8–62.3 ms for all subjects. The results indicate that a reproducible radar signal is obtained from all six subjects. More work is needed on understanding the origin of the radar signals using ultrasound as a comparison. |
| Databáze: | OpenAIRE |
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