Speckle contrast of interfering fluorescence X-rays [PDF]
Journal of Synchrotron Radiation, 2023 With the development of X-ray free-electron lasers (XFELs), producing pulses of femtosecond durations comparable with the coherence times of X-ray fluorescence, it has become possible to observe intensity–intensity correlations due to the interference of
Fabian Trost +14 more
doaj +9 more sources
Optimizing the precision of laser speckle contrast imaging [PDF]
Scientific Reports, 2023 Laser speckle contrast imaging (LSCI) is a rapidly developing technology broadly applied for the full-field characterization of tissue perfusion. Over the recent years, significant advancements have been made in interpreting LSCI measurements and ...
Alberto González Olmos +4 more
doaj +4 more sources
Robust quantitative single-exposure laser speckle imaging with true flow speckle contrast in the temporal and spatial domains [PDF]
arXiv, 2019 A systematic and robust laser speckle contrast imaging (LSCI) method and procedure is presented, covering the LSCI system calibration, static scattering removal, and measurement noise estimation and correction to obtain a true flow speckle contrast and the flow speed from single-exposure LSCI measurements.
Chen-ge Wang +6 more
arxiv +4 more sources
Comparing laser speckle contrast imaging and indocyanine green angiography for assessment of parathyroid perfusion [PDF]
Scientific Reports, 2023 Accurate intraoperative assessment of parathyroid blood flow is crucial to preserve function postoperatively. Indocyanine green (ICG) angiography has been successfully employed, however its conventional application has limitations.
Emmanuel A. Mannoh +4 more
doaj +2 more sources
Choosing a model for laser speckle contrast imaging.
Biomedical Optics Express, 2021 Laser speckle contrast imaging (LSCI) is a real-time full-field non-invasive technique, which is broadly applied to visualize blood flow in biomedical applications.
Chang Liu +4 more
semanticscholar +4 more sources
Supplemental Material for "High Contrast X-ray Speckle from Atomic-Scale Order in Liquids and Glasses" [PDF]
arXiv, 2012 This supplemental material gives additional detail on Experimental Methods and Hard X-ray FEL Source Characteristics, Calculation of Maximum Speckle Contrast, Extracting Contrast of Weak Speckle Patterns, Estimated Temperature Increase from X-ray Absorption, Split-Pulse XPCS Feasibility, and Sample Disturbance During Single Pulses.
S. O. Hruszkewycz +15 more
arxiv +3 more sources
Non-invasive low-cost deep tissue blood flow measurement with integrated Diffuse Speckle Contrast Spectroscopy [PDF]
Frontiers in Neuroergonomics, 2023 Diffuse Correlation Spectroscopy (DCS) is a widely used non-invasive measurement technique to quantitatively measure deep tissue blood flow. Conventional implementations of DCS use expensive single photon counters as detecting elements and optical probes
Arindam Biswas +4 more
doaj +2 more sources
Perfusion measured by laser speckle contrast imaging as a predictor for expansion of psoriasis lesions [PDF]
Skin research and technology, 2021 Skin microvasculature changes are crucial in psoriasis development and correlate with perfusion. The noninvasive Handheld Perfusion Imager (HAPI) examines microvascular skin perfusion in large body areas using laser speckle contrast imaging (LSCI).
Mirjam J Schaap +7 more
semanticscholar +2 more sources
Choosing a laser for laser speckle contrast imaging [PDF]
Scientific Reports, 2019 The 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 ...
D. Postnov +3 more
semanticscholar +5 more sources
Real-time X-ray Phase-contrast Imaging Using SPINNet -- A Speckle-based Phase-contrast Imaging Neural Network [PDF]
arXiv, 2022 X-ray phase-contrast imaging has become indispensable for visualizing samples with low absorption contrast. In this regard, speckle-based techniques have shown significant advantages in spatial resolution, phase sensitivity, and implementation flexibility compared with traditional methods.
Zhi-wei Qiao +6 more
arxiv +3 more sources