Structured-illumination photoacoustic Doppler flowmetry of axial flow in homogeneous scattering media.

Published

Journal Article

We propose a method for photoacoustic flow measurement based on the Doppler effect from a flowing homogeneous medium. Excited by spatially modulated laser pulses, the flowing medium induces a Doppler frequency shift in the received photoacoustic signals. The frequency shift is proportional to the component of the flow speed projected onto the acoustic beam axis, and the sign of the shift reflects the flow direction. Unlike conventional flowmetry, this method does not rely on particle heterogeneity in the medium; thus, it can tolerate extremely high particle density. A red-ink phantom flowing in a tube immersed in water was used to validate the method in both the frequency and time domains. The phantom flow immersed in an intralipid solution was also measured.

Full Text

Duke Authors

Cited Authors

  • Zhang, R; Yao, J; Maslov, KI; Wang, LV

Published Date

  • August 28, 2013

Published In

Volume / Issue

  • 103 / 9

Start / End Page

  • 94101 -

PubMed ID

  • 24065864

Pubmed Central ID

  • 24065864

International Standard Serial Number (ISSN)

  • 0003-6951

Digital Object Identifier (DOI)

  • 10.1063/1.4819735

Language

  • eng