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Proceedings Paper

Bessel beam Grueneisen photoacoustic microscopy with extended depth of field
Author(s): Junhui Shi; Lidai Wang; Cedric Noordam; Lihong V. Wang
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Paper Abstract

The short focal depth of a Gaussian beam limits the volumetric imaging speed of optical resolution photoacoustic microscopy (OR-PAM). A Bessel beam, which is diffraction-free, provides a long focal depth, but its side-lobes may deteriorate image quality when the Bessel beam is directly employed to excite photoacoustic signals in ORPAM. Here, we present a nonlinear approach based on the Grueneisen relaxation effect to suppress the side-lobe artifacts in photoacoustic imaging. This method extends the focal depth of OR-PAM and speeds up volumetric imaging. We experimentally demonstrated a 1-mm focal depth with a 7-μm lateral resolution and volumetrically imaged a carbon fiber and red blood cell samples.

Paper Details

Date Published: 15 March 2016
PDF: 8 pages
Proc. SPIE 9708, Photons Plus Ultrasound: Imaging and Sensing 2016, 97083H (15 March 2016); doi: 10.1117/12.2211198
Show Author Affiliations
Junhui Shi, Washington Univ. in St. Louis (United States)
Lidai Wang, Washington Univ. in St. Louis (United States)
City Univ. of Hong Kong (China)
Cedric Noordam, Washington Univ. in St. Louis (United States)
Univ. of Twente (Netherlands)
Lihong V. Wang, Washington Univ. in St. Louis (United States)


Published in SPIE Proceedings Vol. 9708:
Photons Plus Ultrasound: Imaging and Sensing 2016
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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