Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Can laser speckle flowmetry be made a quantitative tool?

Not Accessible

Your library or personal account may give you access

Abstract

The ultimate objective of laser speckle flowmetry (and a host of specific implementations such as laser speckle contrast analysis, LASCA or LSCA; laser speckle spatial contrast analysis, LSSCA; laser speckle temporal contrast analysis, LSTCA; etc.) is to infer flow velocity from the observed speckle contrast. Despite numerous demonstrations over the past 25 years of such a qualitative relationship, no convincing quantitative relationship has been proven. One reason is a persistent mathematical error that has been propagated by a host of workers; another is a misconception about the proper autocorrelation function for ordered flow. Still another hindrance has been uncertainty in the specific relationship between decorrelation time and local flow velocity. Herein we attempt to dispel some of these errors and misconceptions with the intent of turning laser speckle flowmetry into a quantitative tool. Specifically we review the underlying theory, explore the impact of various analytic models for relating measured intensity fluctuations to scatterer motion, and address some of the practical issues associated with the measurement and subsequent data processing.

© 2008 Optical Society of America

Full Article  |  PDF Article
More Like This
Quantitative laser speckle flowmetry of the in vivo microcirculation using sidestream dark field microscopy

Annemarie Nadort, Rutger G. Woolthuis, Ton G. van Leeuwen, and Dirk J. Faber
Biomed. Opt. Express 4(11) 2347-2361 (2013)

Impact of velocity distribution assumption on simplified laser speckle imaging equation

Julio C Ramirez-San-Juan, Ruben Ramos-Garcia, Ileana Guizar-Iturbide, Gabriel Martinez-Niconoff, and Bernard Choi
Opt. Express 16(5) 3197-3203 (2008)

Robust flow measurement with multi-exposure speckle imaging

Ashwin B. Parthasarathy, W. James Tom, Ashwini Gopal, Xiaojing Zhang, and Andrew K. Dunn
Opt. Express 16(3) 1975-1989 (2008)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (22)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved