Benjamin Keenlyside presents at SPIE Photonics West 2021

Benjamin Keenlyside, PhD student on the IPES CDT, presented a research paper at SPIE Photonics West on 6 March 2021 on the topic of Wavefront shaping through multimode fibres to enable endoscopic photoacoustic tomography.

The paper by Ben and a team of researchers at University College London (UCL) demonstrates how wavefront shaping through multimode fibres onto a Fabry-Perot optical ultrasound sensor can overcome this limitation, producing an endoscopic imaging system with a footprint an order of magnitude smaller than the state of the art.

Watch the presentation here. 

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Abstract

There has been considerable interest in extending photoacoustic imaging techniques to endoscopic devices, which would enable a diverse range of applications, e.g. assessment of coronary artery disease or surgical guidance. However, the difficulty of miniaturising traditional piezoelectric sensors has mostly prevented tomography-mode endoscopic imaging, where an array of sensors is used to reconstruct the full ultrasound field to centimeter-scale depths. In this work we demonstrate how wavefront shaping through multimode fibres onto a Fabry-Perot optical ultrasound sensor can overcome this limitation, producing an endoscopic imaging system with a footprint an order of magnitude smaller than the state of the art.

Citation

Benjamin Keenlyside, Dylan Marques, Maxim Cherkashin, Edward Zhang, Peter Munro, Paul Beard, James Guggenheim, "Wavefront shaping through multimode fibres to enable endoscopic photoacoustic tomography," Proc. SPIE 11652, Adaptive Optics and Wavefront Control for Biological Systems VII, 116520M (5 March 2021); https://doi.org/10.1117/12.2582995