TY - GEN
T1 - Integrated Wearable and Mobile Ultrasound/Photoplethysmography Device via Transparent Ultrasound Transducer
AU - Park, Jeongwoo
AU - Park, Byullee
AU - Kim, Donggyu
AU - Ahn, Joongho
AU - Kim, Jin Young
AU - Kim, Hyung Ham
AU - Kim, Chulhong
N1 - Publisher Copyright:
© 2023 SPIE.
PY - 2023
Y1 - 2023
N2 - Fusion sensors, including photoplethysmograms, cameras, microphones, ultrasound sensors, and accelerometers, are commonly used in mobile and wearable healthcare electronics to measure bio-signals. However, small size is in high demand, but integrating multiple sensors into small mobile or wearable devices is challenging. This study presents two new opto-ultrasound sensors: (1) a wearable device with both photoplethysmography (PPG) and ultrasound (US) capabilities, and (2) a PPG sensor built-in mobile smartphone with an integrated US sensor using a transparent ultrasound transducer (TUT). The TUT has a center frequency of 6 MHz, a 50% bandwidth, and is 82% transparent in the visible and near-infrared ranges. To demonstrate its potential, we developed a wearable device combining photoplethysmography and ultrasound capabilities and fused the TUT to the smartphone. We used this setup to measure heart rates optically and acoustically in human subjects and to calculate oxygen saturation optically through the TUT. This proof-of-concept represents a unique fusion of sensors for small mobile and wearable devices that aim to improve digital healthcare. The results of this research can serve as a basis for innovative development of sensor-based high-tech industrial applications such as healthcare, automobiles, robots, and drones.
AB - Fusion sensors, including photoplethysmograms, cameras, microphones, ultrasound sensors, and accelerometers, are commonly used in mobile and wearable healthcare electronics to measure bio-signals. However, small size is in high demand, but integrating multiple sensors into small mobile or wearable devices is challenging. This study presents two new opto-ultrasound sensors: (1) a wearable device with both photoplethysmography (PPG) and ultrasound (US) capabilities, and (2) a PPG sensor built-in mobile smartphone with an integrated US sensor using a transparent ultrasound transducer (TUT). The TUT has a center frequency of 6 MHz, a 50% bandwidth, and is 82% transparent in the visible and near-infrared ranges. To demonstrate its potential, we developed a wearable device combining photoplethysmography and ultrasound capabilities and fused the TUT to the smartphone. We used this setup to measure heart rates optically and acoustically in human subjects and to calculate oxygen saturation optically through the TUT. This proof-of-concept represents a unique fusion of sensors for small mobile and wearable devices that aim to improve digital healthcare. The results of this research can serve as a basis for innovative development of sensor-based high-tech industrial applications such as healthcare, automobiles, robots, and drones.
KW - photoacoustic imaging
KW - transparent ultrasound transducer
UR - http://www.scopus.com/inward/record.url?scp=85159029459&partnerID=8YFLogxK
U2 - 10.1117/12.2648164
DO - 10.1117/12.2648164
M3 - Conference contribution
AN - SCOPUS:85159029459
T3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
BT - Photons Plus Ultrasound
A2 - Oraevsky, Alexander A.
A2 - Wang, Lihong V.
PB - SPIE
T2 - Photons Plus Ultrasound: Imaging and Sensing 2023
Y2 - 29 January 2023 through 1 February 2023
ER -
