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Related Concept Videos

Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

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Related Experiment Video

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A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation
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A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation

Published on: August 30, 2017

Imaging microvascular flow characteristics using laser speckle contrast imaging.

Abhishek Rege1, Kartikeya Murari, Nan Li

  • 1Department of Biomedical Engineering at the Johns Hopkins University, Baltimore, MD 21205, USA. arege@jhu.edu

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|November 25, 2010
PubMed
Summary
This summary is machine-generated.

Laser speckle contrast imaging (LSCI) now visualizes individual microvessel blood flow. This technique accurately maps flow distribution in branching vessels, aiding neuroscience and surgery.

More Related Videos

How to Build a Laser Speckle Contrast Imaging (LSCI) System to Monitor Blood Flow
05:24

How to Build a Laser Speckle Contrast Imaging (LSCI) System to Monitor Blood Flow

Published on: November 11, 2010

Related Experiment Videos

Last Updated: Jun 6, 2026

A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation
07:20

A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation

Published on: August 30, 2017

How to Build a Laser Speckle Contrast Imaging (LSCI) System to Monitor Blood Flow
05:24

How to Build a Laser Speckle Contrast Imaging (LSCI) System to Monitor Blood Flow

Published on: November 11, 2010

Area of Science:

  • Biomedical Optics
  • Physiology
  • Fluid Dynamics

Background:

  • Laser speckle contrast imaging (LSCI) is traditionally used for regional blood flow assessment in animal models.
  • Previous applications of LSCI have been limited to larger-scale blood flow imaging.
  • Understanding microvascular blood flow is crucial for various physiological and pathological processes.

Purpose of the Study:

  • To demonstrate the capability of LSCI for analyzing blood flow characteristics in individual microvessels.
  • To quantify blood flow distribution within branching microvessel networks.
  • To assess the potential of LSCI in neuroscience and surgical applications.

Main Methods:

  • Utilized LSCI to image microvessels with diameters as small as 24µm.
  • Extracted speckle contrast profiles along vessel diameters and lengths.
  • Applied parabolic curve fitting to diameter profiles (mean R²=0.92).
  • Analyzed axial speckle contrast to identify flow bifurcations and quantify distribution.
  • Validated flow estimates against the law of conservation of mass (mean error 3.5%).

Main Results:

  • Successfully resolved blood flow characteristics in individual microvessels.
  • Observed parabolic flow profiles along vessel diameters, consistent with fluid dynamics.
  • Identified blood flow bifurcations through axial speckle contrast analysis.
  • Quantified blood flow distribution into downstream branches with high accuracy.
  • Demonstrated LSCI's ability to measure flow distribution in branching microvessel trees.

Conclusions:

  • LSCI can effectively elucidate blood flow characteristics at the microvessel level.
  • The technique accurately quantifies blood flow distribution in branching networks, adhering to mass conservation principles.
  • LSCI offers a minimally invasive, dye-free method for wide-field microvascular imaging, with significant potential in neuroscience research and intraoperative neurosurgery.