Results 21 to 30 of about 4,592,774 (277)

In vivo laser speckle contrast imaging of 4-aminopyridine- or pentylenetetrazole-induced seizures [PDF]

open access: yesAPL Bioengineering, 2023
Clinical and preclinical studies on epileptic seizures are closely linked to the study of neurovascular coupling. Obtaining reliable information about cerebral blood flow (CBF) in the area of epileptic activity through minimally invasive techniques is ...
Yuhling Wang   +2 more
doaj   +2 more sources

Handheld laser speckle contrast perfusion imaging [PDF]

open access: yes, 2021
Laser speckle contrast imaging (LSCI) is a noninvasive method for evaluation of microcirculatory blood flow. LSCI has a broad medical application such as reconstructive surgery, burns and dermatology. Commercially available LSCI systems are bulky and operate in mounted modality.
Chizari, Ata; id_orcid
openaire   +3 more sources

Surface strain measurement using pulsed laser shearography with fibre-optic imaging bundles [PDF]

open access: yes, 2008
This thesis describes the development of a shearography instrument for the quantitative measurement of surface strain on dynamic test objects. Shearography is a non-contact, full-field interferometric speckle technique used for the measurement of ...
Francis, Daniel
core   +7 more sources

Laser speckle contrast imaging with principal component and entropy analysis: a novel approach for depth-independent blood flow assessment [PDF]

open access: yesFrontiers 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   +11 more
doaj   +2 more sources

Line Scan Spatial Speckle Contrast Imaging and Its Application in Blood Flow Imaging

open access: yesApplied 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   +3 more
doaj   +1 more source

Correction of overexposure in laser speckle contrast imaging

open access: yesOptics 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   +3 more
openaire   +4 more sources

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

open access: yesShanghai 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

Time varied illumination laser speckle contrast imaging [PDF]

open access: yesOptics 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
openaire   +2 more sources

Choosing a model for laser speckle contrast imaging

open access: yesBiomedical 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. In its foundation is the link between the speckle contrast and dynamics of light scattering particles–erythrocytes. The mathematical form describing this relationship, which is critical for
Chang Liu   +4 more
openaire   +2 more sources

A novel effective method for the assessment of microvascular function in male patients with coronary artery disease: a pilot study using laser speckle contrast imaging [PDF]

open access: yesBrazilian Journal of Medical and Biological Research, 2016
Evaluation of microvascular endothelial function is essential for investigating the pathophysiology and treatment of cardiovascular and metabolic diseases.
J.P. Borges   +6 more
doaj   +3 more sources

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