23 March 2017 All-optical endoscopic probe for high resolution 3D photoacoustic tomography
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Abstract
A novel all-optical forward-viewing photoacoustic probe using a flexible coherent fibre-optic bundle and a Fabry- Perot (FP) ultrasound sensor has been developed. The fibre bundle, along with the FP sensor at its distal end, synthesizes a high density 2D array of wideband ultrasound detectors. Photoacoustic waves arriving at the sensor are spatially mapped by optically scanning the proximal end face of the bundle in 2D with a CW wavelength-tunable interrogation laser. 3D images are formed from the detected signals using a time-reversal image reconstruction algorithm. The system has been characterized in terms of its PSF, noise-equivalent pressure and field of view. Finally, the high resolution 3D imaging capability has been demonstrated using arbitrary shaped phantoms and duck embryo.
Conference Presentation
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R. Ansari, E. Zhang, A. E. Desjardins, P. C. Beard, "All-optical endoscopic probe for high resolution 3D photoacoustic tomography", Proc. SPIE 10064, Photons Plus Ultrasound: Imaging and Sensing 2017, 100641W (23 March 2017); doi: 10.1117/12.2250617; https://doi.org/10.1117/12.2250617
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