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20 April 2020 Towards a miniatured all-fiber photoacoustic endoscope (Conference Presentation)
Qiang Li, Yizhi Liang, Long Jin, Bai-Ou Guan
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Proceedings Volume 11240, Photons Plus Ultrasound: Imaging and Sensing 2020; 112401M (2020) https://doi.org/10.1117/12.2544151
Event: SPIE BiOS, 2020, San Francisco, California, United States
Abstract
We present the all-fiber approach towards building a miniatured, optical-resolution photoacoustic endoscope. The catheter encapsulates two optical fibers for optical excitation and ultrasound detection, respectively. The ultrasound waves are detected with the laser-based fiber optic sensor, with a diameter of 125 μm, instead of a focused piezoelectric transducer. Photoacoustic endoscopic images from a rat rectum have been acquired in vivo with a range of 6.3 mm, a lateral resolution of 10 μm, and a 285° angular field-of-view. The catheter has a diameter of 2.3 mm and can be further reduced by replacing the bulk prism reflector.
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Qiang Li, Yizhi Liang, Long Jin, and Bai-Ou Guan "Towards a miniatured all-fiber photoacoustic endoscope (Conference Presentation)", Proc. SPIE 11240, Photons Plus Ultrasound: Imaging and Sensing 2020, 112401M (20 April 2020); https://doi.org/10.1117/12.2544151
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KEYWORDS
Endoscopes
Photoacoustic spectroscopy
Optical fibers
Reflectors
Prisms
Tissue optics
Transducers
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