https://scholars.lib.ntu.edu.tw/handle/123456789/625150
標題: | Continuous measurement of wrist artery pulse vibration signals using structured-light projection method | 作者: | Chang H.-T Wang C.-H Lee S.-S WEN-JONG WU HUI-TING CHANG |
關鍵字: | Continuous measurement; Digital light processing (DLP) projection; Fringe analysis; Structured-light; Vibration measurement | 公開日期: | 2020 | 卷: | 11352 | 來源出版物: | Proceedings of SPIE - The International Society for Optical Engineering | 摘要: | To realize continuous blood pressure (BP) measurement, we think the vibrational signal of pulsation waveform has good potential for BP model improvement. In this paper, we used a structured light projection method and a fringe analysis method to develop a non-contact measuring tool which used vibrational waveforms of arterial pulsation signals. Our method, based on a triangular configuration, used a digital light processing (DLP) projector and a camera with frame rate of 46 fps. The fringe pattern with pre-defined spatial carrier frequency was projected on the subject’s wrist. In our configuration design, instantaneous pulsation-induced skin vibrations of subtle amplitude can be observed and recorded within each frame of the fringe pattern. Using a two-dimensional Fourier transform, we chose a frequency region of interest (ROI) filter to collect the spectrum magnitude embedded with the deformation data to deliver the phase retrieval. The phase map was unwrapped using a non-iterative unweighted algorithm based on Fast Fourier Transform (FFT), we obtained the unwrapped phase map. After using a phase-to-height conversion, the results of the full-field dynamic vibrational field were analyzed. Several indicators such as heart rhythm (HR), heart rate variable (HRV), and root mean squared errors (RMSE) were adopted to compare the pulsation signal with the ECG and PPG signals. Our results demonstrated that the peak-to-peak arterial of a pulsation waveform amplitude was about 50-70μm which confirmed the suitability of structured light projection method for continuous pulsation signal monitoring. © 2020 SPIE |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121013300&doi=10.1117%2f12.2555341&partnerID=40&md5=71ef80c6a3f57a503678c2a8d124fa4c https://scholars.lib.ntu.edu.tw/handle/123456789/625150 |
ISSN: | 0277786X | DOI: | 10.1117/12.2555341 |
顯示於: | 工程科學及海洋工程學系 |
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