Photoacoustic scanning macroscopy with interferometric ultrasound detection based on a fiber optic ring array

J. Bauer-Marschallinger; A. Höllinger; P. Torke; G. Paltauf; G. Haudum; B. Jakoby; P. Burgholzer; T. Berer

doi:10.1117/12.2289639

19 February 2018 Photoacoustic scanning macroscopy with interferometric ultrasound detection based on a fiber optic ring array

J. Bauer-Marschallinger, A. Höllinger, P. Torke, G. Paltauf, G. Haudum, B. Jakoby, P. Burgholzer, T. Berer

Author Affiliations +

Proceedings Volume 10494, Photons Plus Ultrasound: Imaging and Sensing 2018; 104945V (2018) https://doi.org/10.1117/12.2289639
Event: SPIE BiOS, 2018, San Francisco, California, United States

Abstract

We present a system for large depth-of-field photoacoustic scanning macroscopy (PASMac). Photoacoustic waves are detected optically with a fiber-optic annular detector array. Pressure changes, induced by the photoacoustic waves, modulate the refractive index in the fibers. The resulting variation of the optical path is measured by interferometric means. The ring-shape of the fibers results in a higher sensitivity to pressure waves stemming from the ring symmetry axis compared to off-axis signals. Hence, the fiber-optic ring-shaped detector array embodies a focused ultrasound transducer, however with a greatly extended depth-of-field. To reduce off-axis sensitivity, the signals from multiple rings with varying diameters are summed up using coherence weighting. By raster scanning of the sensor array, threedimensional or cross-sectional images are formed. We report on the design of an enhanced detector with 8 concentric rings for targeted imaging depths ranging from 5 mm to 50 mm.

Citation Download Citation

J. Bauer-Marschallinger, A. Höllinger, P. Torke, G. Paltauf, G. Haudum, B. Jakoby, P. Burgholzer, and T. Berer "Photoacoustic scanning macroscopy with interferometric ultrasound detection based on a fiber optic ring array", Proc. SPIE 10494, Photons Plus Ultrasound: Imaging and Sensing 2018, 104945V (19 February 2018); https://doi.org/10.1117/12.2289639

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