Changes in the biomechanical functions of artery serve as important indicators for prediction of cardiovascular disease. One of the challenges of the ultrasonic arterial measurement is the compression of the artery due to the weight of a conventional ultrasound probe employed and/or undesired probe motion, resulting in artifacts on the measurement results. An approach to address this issue with a low-cost consideration is to use a flexible, lightweight wearable ultrasound sensor which could reduce or avoid deformation of the artery of interest beneath the sensor during the measurement. A flexible lightweight sensor was constructed from a polyvinylidene difluoride (PVDF) piezoelectric film having an active sensing area of 20 mm by 20 mm. The total thickness and weight of the sensor was 0.75 mm and 2g, respectively. The flexible sensor was applied to perform measurements of the brachial artery of a healthy subject. It was successfully demonstrated that the flexible sensor was able to measure the arterial diameter changes corresponding to the cardiac cycle with less motion artifacts.

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Keywords Arterial diameter measurement, Cardiovascular disease, Motion artifact, Ultrasound pulse echo technique, Wearable and flexible ultrasonic sensor
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Conference 2017 IEEE International Ultrasonics Symposium, IUS 2017
Huang, A. (Andy), Yoshida, M. (Masayoshi), Ono, Y, & Rajan, S. (2017). Continuous measurement of arterial diameter using wearable and flexible ultrasonic sensor. In IEEE International Ultrasonics Symposium, IUS. doi:10.1109/ULTSYM.2017.8091557