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8 March 2021 Breaking sensitivity limits of optical ultrasound sensors used in photoacoustic imaging
James A. Guggenheim, Dylan M. Marques, Peter R. T. Munro, David Martin-Sanchez, Edward Z. Zhang, Paul C. Beard
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Proceedings Volume 11642, Photons Plus Ultrasound: Imaging and Sensing 2021; 1164207 (2021) https://doi.org/10.1117/12.2582730
Event: SPIE BiOS, 2021, Online Only
Abstract
The impact of optical absorption in the spacer layer of Fabry-Pérot (FP) ultrasound sensors is discussed. It is shown that absorption significantly limits the sensitivity of planoconcave microresonators (PCMRs; FP type sensors with a planoconcave geometry). Using materials of lower absorption or selecting sensor interrogation wavelengths to avoid absorption peaks in existing spacer materials could provide at least an order of magnitude higher sensitivity, paving the way to multi-cm deep-tissue PA imaging applications.
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James A. Guggenheim, Dylan M. Marques, Peter R. T. Munro, David Martin-Sanchez, Edward Z. Zhang, and Paul C. Beard "Breaking sensitivity limits of optical ultrasound sensors used in photoacoustic imaging", Proc. SPIE 11642, Photons Plus Ultrasound: Imaging and Sensing 2021, 1164207 (8 March 2021); https://doi.org/10.1117/12.2582730
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KEYWORDS
Sensors
Absorption
Ultrasonography
Microresonators
Photoacoustic spectroscopy
Tissue optics
Image resolution
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