Laser-scanning Doppler photoacoustic microscopy based on temporal correlation

Wei Song, Wenzhong Liu, Hao F. Zhang

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

We present a methodology to measure absolute flow velocity using laser-scanning photoacoustic microscopy. To obtain the Doppler angle, the angle between ultrasonic detection axis and flow direction, we extracted the distances between the transducer and three adjacent scanning points along the flow and repeatedly applied the law of cosines. To measure flow velocity along the ultrasonic detection axis, we calculated the time shift between two consecutive photoacoustic waves at the same scanning point, then converted the time shift to velocity according to the sound velocity and time interval between two laser illuminations. We verified our method by imaging flow phantoms.

Original languageEnglish (US)
Article number203501
JournalApplied Physics Letters
Volume102
Issue number20
DOIs
StatePublished - May 20 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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