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3 March 2022 High-resolution, high-speed photoacoustic microscopy and photoplethysmography for clinical applications in human fingers
Joongho Ahn, Jinwoo Baik, Hyojin Kim, Yeonggeun Kim, Jin Young Kim, Hyung Ham Kim, Chulhong Kim
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Proceedings Volume 11960, Photons Plus Ultrasound: Imaging and Sensing 2022; 119600H (2022) https://doi.org/10.1117/12.2608377
Event: SPIE BiOS, 2022, San Francisco, California, United States
Abstract
Heart and blood vessels called the cardiovascular system closely interact with each other to control cardiac output and maintain vital activities. To observe heartbeat and vascular changes, high-resolution high-speed photoacoustic microscopy (PAM) and/or photoplethysmography (PPG) that are applied technologies of optics have been utilized in preclinical and clinical studies. Herein, we have embedded PPG sensing functionality in a high-speed PAM system to simultaneously perform microvascular imaging and heart rate measurement. In human fingers, we observed capillaries’ movements in blood vessel images from PAM, and moreover found that this phenomenon is due to pulsation by directly comparing between the capillaries’ movements and pulsation-dominant PPG signals. Further, the cardiac cycle could be extracted by quantifying the capillaries’ movements in consecutive blood vessel images, and this periodicity from PAM agreed with that from that of PPG sensing. From these results, the high-speed PAM with PPG could be potentially used as clinical tools for monitoring the changes in multiple cardiovascular information in response to internal and/or external circumstances.
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Joongho Ahn, Jinwoo Baik, Hyojin Kim, Yeonggeun Kim, Jin Young Kim, Hyung Ham Kim, and Chulhong Kim "High-resolution, high-speed photoacoustic microscopy and photoplethysmography for clinical applications in human fingers", Proc. SPIE 11960, Photons Plus Ultrasound: Imaging and Sensing 2022, 119600H (3 March 2022); https://doi.org/10.1117/12.2608377
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KEYWORDS
Blood vessels
Heart
Imaging systems
In vivo imaging
Photoplethysmography
Photoacoustic microscopy
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