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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 4, Iss. 10 — Oct. 1, 2013
  • pp: 1883–1889

Effects of speckle/pixel size ratio on temporal and spatial speckle-contrast analysis of dynamic scattering systems: Implications for measurements of blood-flow dynamics

J. C. Ramirez-San-Juan, E. Mendez-Aguilar, N. Salazar-Hermenegildo, A. Fuentes-Garcia, R. Ramos-Garcia, and B. Choi  »View Author Affiliations


Biomedical Optics Express, Vol. 4, Issue 10, pp. 1883-1889 (2013)
http://dx.doi.org/10.1364/BOE.4.001883


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Abstract

Laser Speckle Contrast Imaging (LSCI) is an optical technique used to generate blood flow maps with high spatial and temporal resolution. It is well known that in LSCI, the speckle size must exceed the Nyquist criterion to maximize the speckle's pattern contrast. In this work, we study experimentally the effect of speckle-pixel size ratio not only in dynamic speckle contrast, but also on the calculation of the relative flow speed for temporal and spatial analysis. Our data suggest that the temporal LSCI algorithm is more accurate at assessing the relative changes in flow speed than the spatial algorithm.

© 2013 OSA

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(120.6150) Instrumentation, measurement, and metrology : Speckle imaging
(120.7250) Instrumentation, measurement, and metrology : Velocimetry

ToC Category:
Speckle Imaging and Diagnostics

History
Original Manuscript: May 24, 2013
Revised Manuscript: July 25, 2013
Manuscript Accepted: July 26, 2013
Published: August 30, 2013

Citation
J. C. Ramirez-San-Juan, E. Mendez-Aguilar, N. Salazar-Hermenegildo, A. Fuentes-Garcia, R. Ramos-Garcia, and B. Choi, "Effects of speckle/pixel size ratio on temporal and spatial speckle-contrast analysis of dynamic scattering systems: Implications for measurements of blood-flow dynamics," Biomed. Opt. Express 4, 1883-1889 (2013)
http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-4-10-1883


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