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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 16 — Aug. 11, 2014
  • pp: 19327–19336

Quantitatively assessing flow velocity by the slope of the inverse square of the contrast values versus camera exposure time

Jialin Liu, Hongchao Zhang, Zhonghua Shen, Jian Lu, and Xiaowu Ni  »View Author Affiliations

Optics Express, Vol. 22, Issue 16, pp. 19327-19336 (2014)

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The slope of the inverse square of the contrast values versus camera exposure time at multi-exposure speckle imaging (MESI) can be a new indicator of flow velocity. The slope is linear as the diffuse coefficient in Brownian motion diffusion model and the mean velocity in ballistic motion model. Combining diffuse speckle contrast analysis (DSCA) and MESI, we demonstrate theoretically and experimentally that the flow velocity can be obtained from this slope. The calculation results processes of the slop don’t need tedious Newtonian iterative method and are computationally inexpensive. The new indicator can play an important role in quantitatively assessing tissue blood flow velocity.

© 2014 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(290.1990) Scattering : Diffusion
(290.4210) Scattering : Multiple scattering

ToC Category:
Image Processing

Original Manuscript: June 3, 2014
Revised Manuscript: July 22, 2014
Manuscript Accepted: July 26, 2014
Published: August 4, 2014

Virtual Issues
Vol. 9, Iss. 10 Virtual Journal for Biomedical Optics

Jialin Liu, Hongchao Zhang, Zhonghua Shen, Jian Lu, and Xiaowu Ni, "Quantitatively assessing flow velocity by the slope of the inverse square of the contrast values versus camera exposure time," Opt. Express 22, 19327-19336 (2014)

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