Increasing the sensitivity of Fabry-Perot ultrasound sensor using Bessel beam interrogation: a feasibility study

Dylan M. Marques; Oliver Sheppard; Edward Z. Zhang; Paul C. Beard; Peter R. T. Munro; James A. Guggenheim

doi:10.1117/12.2652174

9 March 2023 Increasing the sensitivity of Fabry-Perot ultrasound sensor using Bessel beam interrogation: a feasibility study

Dylan M. Marques, Oliver Sheppard, Edward Z. Zhang, Paul C. Beard, Peter R. T. Munro, James A. Guggenheim

Author Affiliations +

Proceedings Volume PC12379, Photons Plus Ultrasound: Imaging and Sensing 2023; PC123790F (2023) https://doi.org/10.1117/12.2652174
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

Fabry-Perot (FP) ultrasound sensors are widely used for Photoacoustic Tomography (PAT), affording high resolution (<100 μm) images, with a penetration depth of about 1 cm, limited by system's sensitivity. The sensitivity is, in turn, limited by the shape of the Gaussian beam typically used to interrogate the FP sensor, which is not well "confined" inside the FP cavity. To overcome this limitation, a novel PAT system employing Bessel beam to interrogate the FP sensor was prototyped. Unlike Gaussian beams, Bessel beams are well confined in the FP cavity, increasing the system's sensitivity by multiple orders of magnitude, paving the way to multi-centimetre clinical PAT imaging with high resolution

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Dylan M. Marques, Oliver Sheppard, Edward Z. Zhang, Paul C. Beard, Peter R. T. Munro, and James A. Guggenheim "Increasing the sensitivity of Fabry-Perot ultrasound sensor using Bessel beam interrogation: a feasibility study", Proc. SPIE PC12379, Photons Plus Ultrasound: Imaging and Sensing 2023, PC123790F (9 March 2023); https://doi.org/10.1117/12.2652174

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KEYWORDS

Bessel beams

Sensors

Fabry–Perot interferometers

Photoacoustic tomography

Imaging systems

Tissue optics

Acquisition tracking and pointing

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