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This paper presents the first clinical results for validating the accuracy of respiratory rate obtained for hospitalized patients using a non-contact, low power 2.4 GHz Doppler radar system. Twenty-four patients were measured in this study. The respiratory rate accuracy was benchmarked against the respiratory rate obtained using Welch Allyn Propaq Encore model 242, the Embla Embletta system with Universal...
This paper describes and quantifies three main sources of baseband noise affecting physiological signals in a direct conversion microwave Doppler radar for life signs detection. They are thermal noise, residual phase noise, and Flicker noise. In order to increase the SNR of physiological signals at baseband, the noise floor, in which the Flicker noise is the most dominant factor, needs to be minimized...
The single-channel Doppler radar system was evaluated for heart rate variability (HRV) measurement. Pearson PMCC, scatter plots, absolute differences, and mean were used and demonstrated good correlation between Doppler radar operating at different power levels and the finger pulse reference. Doppler radar may be of interest for heartbeat monitoring because of its remote sensing ability and shows...
Excessive visceral fat is a main cause of life-style related diseases such as diabetes. If a simple measurement of visceral fat distribution in vivo is realized, it will greatly help as to prevent ourselves from these diseases. To measure fat distribution in vivo, some methods such as X-rays CT have been used. In this paper, we used an electric impedance tomography (EIT) method. It has some advantages...
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