Optimizing the precision of laser speckle contrast imaging

Article Neurosciences

Continuous blood flow visualization with laser speckle contrast imaging during neurovascular surgery

David R. Miller et al.

Summary: This study demonstrates the ability of LSCI to continuously visualize blood flow during neurovascular procedures and provides different yet complementary information compared to ICGA.

NEUROPHOTONICS (2022)

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Article Optics

Correcting sampling bias in speckle contrast imaging

Shuqi Zheng et al.

Summary: When performing spatial or temporal laser speckle contrast imaging, the estimated speckle contrast is often biased due to the use of localized windows containing limited numbers of independent speckle grains. This study presents an approach to determine the number of speckle grains and corrects for this bias, leading to a more accurate estimation of the speckle decorrelation time.

OPTICS LETTERS (2022)

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Article Biochemical Research Methods

Model of dynamic speckle evolution for evaluating laser speckle contrast measurements of tissue dynamics

Sharvari Zilpelwar et al.

Summary: In this study, a dynamic speckle model (DSM) is introduced to simulate the temporal evolution of fully developed speckle patterns caused by scattered light reemitted from dynamic tissue. Using this model, the performance of laser speckle contrast imaging (LSCI) or speckle contrast optical spectroscopy (SCOS) systems, which quantify tissue dynamics using the spatial contrast of the speckle patterns with a certain camera exposure time, is evaluated. Noise sources arising from speckle statistics and experimental conditions are investigated, and an analytical noise model is calibrated and validated experimentally. The findings provide design principles for LSCI or SCOS systems that monitor human brain blood flow and functions.

BIOMEDICAL OPTICS EXPRESS (2022)

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Article Biochemical Research Methods

Direct characterization of tissue dynamics with laser speckle contrast imaging

Shuqi Zheng et al.

Summary: Laser speckle contrast imaging (LSCI) is a technique for monitoring tissue dynamics. We introduce a model-free method to reconstruct the speckle field decorrelation time, which is applicable to both ergodic and non-ergodic measurements.

BIOMEDICAL OPTICS EXPRESS (2022)

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Article Optics

Vertically Polarized Laser Speckle Contrast Imaging to Monitor Blood Flow in Pulp

Fenfen Xu et al.

Summary: The study compared the polarized and non-polarized laser speckle contrast imaging systems for assessing pulp blood flow. The results indicated that the vp-LSCI system could detect a wider contrast dynamic range, while the time contrast algorithm showed a higher detectability index compared to the space contrast algorithm.

JOURNAL OF MODERN OPTICS (2021)

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Article Biochemical Research Methods

Choosing a model for laser speckle contrast

Chang Liu et al.

Summary: Laser speckle contrast imaging (LSCI) is a real-time full-field non-invasive technique widely used in visualizing blood flow in biomedical applications. Critical assumptions in LSCI theory were reviewed, and it was shown how they can impact the accuracy of blood flow estimation. Based on recent experimental results, an alternative model was proposed for higher accuracy in measuring blood flow changes.

BIOMEDICAL OPTICS EXPRESS (2021)

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Article Neurosciences

Awake chronic mouse model of targeted pial vessel occlusion via photothrombosis

Smrithi Sunil et al.

NEUROPHOTONICS (2020)

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Article Multidisciplinary Sciences

Validating a low-cost laser speckle contrast imaging system as a quantitative tool for assessing retinal vascular function

Dwani D. Patel et al.

SCIENTIFIC REPORTS (2020)

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Article Multidisciplinary Sciences

Dynamic light scattering imaging

Dmitry D. Postnov et al.

SCIENCE ADVANCES (2020)

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Article Multidisciplinary Sciences

Choosing a laser for laser speckle contrast imaging

Dmitry D. Postnov et al.

SCIENTIFIC REPORTS (2019)

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Article Engineering, Biomedical

Monitoring Acute Stroke in Mouse Model Using Laser Speckle Imaging-Guided Visible-Light Optical Coherence Tomography

Qi Liu et al.

IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING (2018)

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Article Optics

Ergodic and non-ergodic regimes in temporal laser speckle imaging

Pavel Zakharov

OPTICS LETTERS (2017)

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Article Multidisciplinary Sciences

Optic nerve head and retinal blood flow regulation during isometric exercise as assessed with laser speckle flowgraphy

Katarzyna J. Witkowska et al.

PLOS ONE (2017)

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Article Biochemical Research Methods

Simulation of speckle patterns with pre-defined correlation distributions

Lipei Song et al.

BIOMEDICAL OPTICS EXPRESS (2016)

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Article Biochemical Research Methods

Laser speckle analysis of retinal vascular dynamics

Anastasiia Y. Neganova et al.

BIOMEDICAL OPTICS EXPRESS (2016)

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Article Endocrinology & Metabolism

Mapping functional connectivity using cerebral blood flow in the mouse brain

Karla M. Bergonzi et al.

JOURNAL OF CEREBRAL BLOOD FLOW AND METABOLISM (2015)

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Article Rheumatology

Use of Laser Speckle Contrast Imaging to Assess Digital Microvascular Function in Primary Raynaud Phenomenon and Systemic Sclerosis: A Comparison Using the Raynaud Condition Score Diary

John D. Pauling et al.

JOURNAL OF RHEUMATOLOGY (2015)

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Article Optics

Simple correction factor for laser speckle imaging of flow dynamics

J. C. Ramirez-San-Juan et al.

OPTICS LETTERS (2014)

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Article Biochemical Research Methods

Laser speckle contrast imaging: theoretical and practical limitations

David Briers et al.

JOURNAL OF BIOMEDICAL OPTICS (2013)

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Article Optics

Skin perfusion evaluation between laser speckle contrast imaging and laser Doppler flowmetry

Anne Humeau-Heurtier et al.

OPTICS COMMUNICATIONS (2013)

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Article Optics

Correcting speckle contrast at small speckle size to enhance signal to noise ratio for laser speckle contrast imaging

Jianjun Qiu et al.

OPTICS EXPRESS (2013)

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Article Peripheral Vascular Disease

Evaluation of systemic microvascular endothelial function using laser speckle contrast imaging

Ivan Cordovil et al.

MICROVASCULAR RESEARCH (2012)

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Article Endocrinology & Metabolism

Thrombotic distal middle cerebral artery occlusion produced by topical FeCl3 application: a novel model suitable for intravital microscopy and thrombolysis studies

Hulya Karatas et al.

JOURNAL OF CEREBRAL BLOOD FLOW AND METABOLISM (2011)

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Article Biochemical Research Methods

Laser speckle contrast imaging in biomedical optics

David A. Boas et al.

JOURNAL OF BIOMEDICAL OPTICS (2010)

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Article Biochemical Research Methods

Quantitative imaging of ischemic stroke through thinned skull in mice with Multi Exposure Speckle Imaging

Ashwin B. Parthasarathy et al.

BIOMEDICAL OPTICS EXPRESS (2010)

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Article Biochemical Research Methods

Long-term, high-resolution imaging in the mouse neocortex through a chronic cranial window

Anthony Holtmaat et al.

NATURE PROTOCOLS (2009)

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Article Optics

Robust flow measurement with multi-exposure speckle imaging

Ashwin B. Parthasarathy et al.

OPTICS EXPRESS (2008)

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Article Optics

Detrimental effects of speckle-pixel size matching in laser speckle contrast imaging

Sean J. Kirkpatrick et al.

OPTICS LETTERS (2008)

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Article Optics

The copula: a tool for simulating speckle dynamics

Donald D. Duncan et al.

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION (2008)

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Article Optics

Quantitative modeling of laser speckle imaging

Pavel Zakharov et al.

OPTICS LETTERS (2006)

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Article Optics

Determination of optimal exposure time for imaging of blood flow changes with laser speckle contrast imaging

S Yuan et al.

APPLIED OPTICS (2005)

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Article Biochemistry & Molecular Biology

Intrinsic brain activity triggers trigeminal meningeal afferents in a migraine model

H Bolay et al.

NATURE MEDICINE (2002)

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Article Endocrinology & Metabolism

Dynamic imaging of cerebral blood flow using laser speckle

AK Dunn et al.

JOURNAL OF CEREBRAL BLOOD FLOW AND METABOLISM (2001)

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Optimizing the precision of laser speckle contrast imaging

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