All-optical endoscopic probe for high resolution 3D photoacoustic tomography

R. Ansari, E. Zhang, A. E. Desjardins, P. C. Beard, Alexander A. Oraevsky, Lihong V. Wang
2017 Photons Plus Ultrasound: Imaging and Sensing 2017  
A novel all-optical forward-viewing photoacoustic probe using a flexible coherent fibre-optic bundle and a Fabry-Pérot (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
more » ... e 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.
doi:10.1117/12.2250617 fatcat:m5v3ihzblzg6vm5zp6owcpm4lq