A Pulsed Wave Doppler Ultrasound Blood Flowmeter by PMUTs

This letter describes a blood flowmeter by the pulsed wave Doppler (PWD) ultrasound detection procedure utilizing piezoelectric micromachined ultrasonic transducers (pMUTs) with the aluminum nitride (AlN) film as the piezoelectric material. The transceiver electronics for the PWD scheme are construc...

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Veröffentlicht in:	Journal of microelectromechanical systems 2021-10, Vol.30 (5), p.680-682
Hauptverfasser:	Ding, Hong, Yang, Dengfei, Qu, Mengjiao, Yang, Chao, Chen, Xuying, Le, Xianhao, Zhu, Ke, Xu, Jinghui, Lin, Liwei, Xie, Jin
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustics Aluminum Blood Blood flow blood flowmeter Doppler effect Electron tubes Flow measurement Flow velocity Micromachining Piezoelectric micromachined ultrasonic transducer (pMUT) Piezoelectricity pulsed wave Doppler Signal processing Transducers Ultrasonic imaging Ultrasonic variables measurement Velocity measurement
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Beschreibung
Zusammenfassung:	This letter describes a blood flowmeter by the pulsed wave Doppler (PWD) ultrasound detection procedure utilizing piezoelectric micromachined ultrasonic transducers (pMUTs) with the aluminum nitride (AlN) film as the piezoelectric material. The transceiver electronics for the PWD scheme are constructed for system control and signal processing, and a blood-mimicking fluid (BMF) is synthesized for flow velocity tests. Both the average Doppler frequency-shift and Doppler power spectrum density (PSD) shift with respect to the flow velocity have been characterized and validated, and the flow direction can also be recognized. Finally, a real-time pulsatile flow measurement is demonstrated to emulate the feasibility of monitoring blood flows in practice. [2021-0077]
ISSN:	1057-7157 1941-0158
DOI:	10.1109/JMEMS.2021.3103756