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Journal of Biomedical Optics

Transverse flow imaging based on photoacoustic Doppler bandwidth broadening
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Paper Abstract

We propose a new method to measure transverse flow velocity based on photoacoustic Doppler bandwidth broadening, which is determined by the geometry of the probe-beam and the velocity of the transverse flow. By exploiting pulsed laser excitation and raster motor scanning, three-dimensional structure and flow velocity can be imaged simultaneously. In addition, the flow direction can be determined with bidirectional scanning. In a flowing suspension of red-dyed microspheres (diameter: 6 μm), transverse flow speeds ranging from 0 to 2.5 mm/s as well as flow direction were measured. A cross-sectional flow image was also obtained with the tube laid in a zigzag pattern.

Paper Details

Date Published: 1 March 2010
PDF: 5 pages
J. Biomed. Opt. 15(2) 021304 doi: 10.1117/1.3339953
Published in: Journal of Biomedical Optics Volume 15, Issue 2
Show Author Affiliations
Junjie Yao, Washington Univ. in St. Louis (United States)
Lihong V. Wang, Washington Univ. in St. Louis (United States)


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