Results 11 to 20 of about 26,392 (323)
Laser speckle contrast imaging to assess microcirculation [PDF]
Cardiology Journal, 2022 International ...
Marcin Hellmann +2 more
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Multimodal real-time imaging with laser speckle contrast and fluorescent contrast
Photodiagnosis and Photodynamic Therapy, 2023 Introduction: Laser speckle contrast imaging (LSCI) can achieve real-time 2D perfusion maps non-invasively. However, LSCI is still difficult to use in general clinical applications because of movement sensitivity and limitations in blood flow analysis ...
Hyun-Seo Park +5 more
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Choosing a laser for laser speckle contrast imaging [PDF]
Scientific Reports, 2019 AbstractThe use of laser speckle contrast imaging (LSCI) has expanded rapidly for characterizing the motion of scattering particles. Speckle contrast is related to the dynamics of the scattering particles via a temporal autocorrelation function, but the quality of various elements of the imaging system can adversely affect the quality of the signal ...
Dmitry D. Postnov +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 +4 more
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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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Clinical applications of laser speckle contrast imaging: a review [PDF]
Journal of Biomedical Optics, 2019 When a biological tissue is illuminated with coherent light, an interference pattern will be formed at the detector, the so-called speckle pattern. Laser speckle contrast imaging (LSCI) is a technique based on the dynamic change in this backscattered light as a result of interaction with red blood cells. It can be used to visualize perfusion in various
Wido Heeman +3 more
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Imaging depth and multiple scattering in laser speckle contrast imaging [PDF]
Journal of Biomedical Optics, 2014 Laser speckle contrast imaging (LSCI) is a powerful and simple method for full field imaging of blood flow. However, the depth dependence and the degree of multiple scattering have not been thoroughly investigated. We employ three-dimensional Monte Carlo simulations of photon propagation combined with high resolution vascular anatomy to investigate ...
Mitchell A. Davis +2 more
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Depth resolution in multifocus laser speckle contrast imaging
Optics Letters, 2021 Laser speckle contrast imaging (LSCI) can be used to evaluate blood flow based on spatial or temporal speckle statistics, but its accuracy is undermined by out-of-focus image blur. In this Letter, we show how the fraction of dynamic versus static light scattering is dependent on focus, and describe a deconvolution strategy to correct for out-of-focus ...
Shuqi Zheng +4 more
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Laser speckle contrast imaging system using nanosecond pulse laser source [PDF]
Journal of Biomedical Optics, 2020 Nanosecond-pulsed laser has proven to be used to obtain the velocity of blood using the speckle contrast method. Without the scanning time, it has potential for achieving fast two-dimensional blood flow images in a photoacoustic imaging system with the same pulsed laser.Our study aimed to evaluate the qualities of regional cerebral blood flow (rCBF ...
Yuemei Zhao +5 more
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Predicting successful stellate ganglion block using laser speckle contrast imaging
Chinese Medical Journal, 2021 Xi Wu +4 more
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