Real correlation time measurement in laser speckle contrast analysis using wide exposure time range images

T. Smausz, Dániel Zölei, B. Hopp

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

In laser speckle contrast analysis (LASCA) used for imaging of blood flow, besides the moving blood cells, the speckle pattern is also influenced by the imaging system and scattering properties of the laser-illuminated static surface. A latex microsphere (650 nm size) emulsion was covered with scattering semitransparent materials (Teflon foils, tracing paper). Speckle images were recorded with different exposure times (0.2ms-500ms), and correlation times were determined by parameterizing the theoretical contrast-exposure time function. The correlation times obtained for covered and uncovered microsphere emulsions were in good agreement. The possibility of obtaining comparable, setup-independent results in blood perfusion monitoring can contribute to better applicability of LASCA.

Original languageEnglish
Pages (from-to)1425-1429
Number of pages5
JournalApplied Optics
Volume48
Issue number8
DOIs
Publication statusPublished - Mar 10 2009

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Speckle
Time measurement
time measurement
emulsions
Blood
Lasers
Microspheres
Emulsions
lasers
blood cells
time functions
teflon (trademark)
speckle patterns
Scattering
blood flow
tracing
latex
scattering
blood
foils

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Real correlation time measurement in laser speckle contrast analysis using wide exposure time range images. / Smausz, T.; Zölei, Dániel; Hopp, B.

In: Applied Optics, Vol. 48, No. 8, 10.03.2009, p. 1425-1429.

Research output: Contribution to journalArticle

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