SNR-enhanced fiber-laser ultrasound sensors for photoacoustic tomography*

Yizhi Liang; Long Jin; Jun Ma; Lidai Wang

doi:10.1117/12.2542925

17 February 2020 SNR-enhanced fiber-laser ultrasound sensors for photoacoustic tomography*

Yizhi Liang, Long Jin, Jun Ma, Lidai Wang

Proceedings Volume 11240, Photons Plus Ultrasound: Imaging and Sensing 2020; 112400S (2020) https://doi.org/10.1117/12.2542925
Event: SPIE BiOS, 2020, San Francisco, California, United States

Abstract

Optical detection of ultrasound for photoacoustic imaging has received great interest. Recently, we have developed a new fiber-optic ultrasound sensor by exploiting dual-polarization fiber laser. It offers high sensitivity (40 Pa over 50 MHz) as well as good stability as a result of the self-heterodyning detection. In this work, the signal-to-noise ratio has been enhanced by suppressing the noise of the ultrasound sensing system via signal averaging. As a result of multiple measurements of a single photoacoustic signal, the total noise was reduced by 40%. With the enhanced detection capability, the sensors have been deployed as photoacoustic probes in different imaging modalities. We demonstrate fastscanning photoacoustic microscopy with a field-of-view 2×2 mm², a frame rate of 2 Hz to visualize the blood flow dynamics. By bending the flexible fiber optic sensor for geometrical focusing, PACT was realized to image a mouse brain with a spatial resolution of 70 μm. An all-fiber photoacoustic endoscope was built to in vivo image the vascular network of a rat rectum, with a lateral resolution of 10 μm, with a 2.3-mm probe diameter.

Conference Presentation

Citation Download Citation

Yizhi Liang, Long Jin, Jun Ma, and Lidai Wang "SNR-enhanced fiber-laser ultrasound sensors for photoacoustic tomography*", Proc. SPIE 11240, Photons Plus Ultrasound: Imaging and Sensing 2020, 112400S (17 February 2020); https://doi.org/10.1117/12.2542925

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available