Results 21 to 30 of about 10,506 (277)

Laser speckle contrast imaging is sensitive to advective flux

Journal of Biomedical Optics, 2016
Unlike laser Doppler flowmetry, there has yet to be presented a clear description of the physical variables that laser speckle contrast imaging (LSCI) is sensitive to. Herein, we present a theoretical basis for demonstrating that LSCI is sensitive to total flux and, in particular, the summation of diffusive flux and advective flux.
Kosar, Khaksari, Sean J, Kirkpatrick
openaire   +3 more sources

Methods of producing laser speckle contrast images

, 2014
Methods of imaging are provided. In some embodiments, the methods may comprise obtaining a raw speckle image of a sample, converting the raw speckle image to a laser speckle contrast image using a laser speckle contrast algorithm, and converting a laser speckle contrast image to a relative correlation time image using a relative correlation time ...
Andrew Eric Dunn, William James Tom
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Vessel packaging effect in laser speckle contrast imaging and laser Doppler imaging [PDF]

Journal of Biomedical Optics, 2017
Laser speckle-based techniques are frequently used to assess microcirculatory blood flow. Perfusion estimates are calculated either by analyzing the speckle fluctuations over time as in laser Doppler flowmetry (LDF), or by analyzing the speckle contrast as in laser speckle contrast imaging (LSCI).
Ingemar, Fredriksson, Marcus, Larsson
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Laser speckle contrast imaging with principal component and entropy analysis: a novel approach for depth-independent blood flow assessment [PDF]

Frontiers of Optoelectronics
Current study presents an advanced method for improving the visualization of subsurface blood vessels using laser speckle contrast imaging (LSCI), enhanced through principal component analysis (PCA) filtering.
Yu. Surkov, P. Timoshina, I. Serebryakova, D. Stavtcev, I. Kozlov, G. Piavchenko, I. Meglinski, A. Konovalov, D. Telyshev, S. Kuznetcov, E. Genina, V. Tuchin   +11 more
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Laser speckle contrast imaging for functional visualization

, 2022
Tiivistelmä Lasertäpläkontrastikuvantaminen on nykyaikainen tekniikka, joka soveltuu ainutlaatuisesti koko havainnointikentän alueella tunkeutumattomasti tapahtuville liikkuvien hiukkasten mittauksille satunnaisesti epähomogeenisten, suuresti sirottavien ja absorboivien väliaineiden kuten biologisten kudosten tapauksessa.
Sdobnov, A. (Anton)
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Correction of overexposure in laser speckle contrast imaging

Optics Express, 2022
Laser speckle contrast imaging (LSCI) is a method to visualize and quantify tissue perfusion and blood flow. A common flaw in LSCI variants is their sensitivity to the optical setup parameters and that they operate well only on statistics of undistorted laser speckle patterns.
Péter Földesy, Máté Siket, Ádám Nagy, Imre Jánoki   +3 more
openaire   +4 more sources

Modelling movement artefacts in handheld laser speckle contrast imaging [PDF]

, 2023
Progress has been made in laser speckle contrast imaging (LSCI) of microcirculatory blood flow for biology and medicine. However, the underlying reason for occurrence of movement artefacts (MA) that compromises effective use of LSCI remains largely ...
Steenbergen, Wiendelt, Tsong, Wilson, Knop, Tom, Wang, Ruikang K., Chizari, Ata, Tuchin, Valery V., Leahy, Martin J., Zalevsky, Zeev   +7 more
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Line Scan Spatial Speckle Contrast Imaging and Its Application in Blood Flow Imaging

Applied Sciences, 2021
Laser speckle imaging has been an indispensable tool for visualizing blood flow in biomedical applications. We proposed a novel design of the laser speckle imaging system, which combines confocal illumination and detection with various speckle analysis ...
E Du, Shuhao Shen, Anqi Qiu, Nanguang Chen   +3 more
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Time varied illumination laser speckle contrast imaging [PDF]

Optics Letters, 2021
Laser speckle contrast imaging is a technique to determine blood flow rate with a limitation of low dynamic range. In this Letter, we introduce a varied illumination speckle contrast imaging method. It utilizes varying illumination during exposure to customize the correlation time (flow rate) to speckle contrast relation.
Máté Siket, Imre Jánoki, Kssornél Demeter, Miklós Szabó, Péter Földesy   +4 more
openaire   +2 more sources

Real-Time Laser Speckle Imaging of Blood Flow with High Gray Level and High Resolution

Shanghai Jiaotong Daxue xuebao, 2023
Laser speckle contrast imaging (LSCI) is a large measurement ranging, real-time, high spatial resolution optical imaging method. Exisiting reserches show that the low gray level (8-bit) and low resolution (752×480 pixels) camera can effectively monitor ...
ZHANG Zelong, ZHANG Yingchao, WU Bo, DONG Wei, FAN Youben
doaj   +1 more source