Results 11 to 20 of about 25,478 (173)

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, Min-Jae Shim, Yikeun Kim, Taek-Yong Ko, Jin-Hyuk Choi, Yeh-Chan Ahn   +5 more
doaj   +3 more sources

Depth of Field Extension in Laser Speckle Contrast Imaging [PDF]

IEEE Access, 2020
A new technique that can increase the depth of field (DOF) for in vivo tissue imaging is presented. Extended DOF for the imaging of strongly scattering media is realized through combining laser speckle contrast imaging (LSCI) with light field (LF ...
Xiaohui Ma, Anting Wang, Fenghua Ma, Shuimei Wu, Hai Ming, Qiwen Zhan   +5 more
doaj   +2 more sources

Laser speckle contrast imaging of hepatic microcirculation. [PDF]

Biomed Opt Express
Abstract The liver controls blood homeostasis and depends critically on adequate blood supply. While the global regulation of liver blood flow via the hepatic arterial buffer response is well established, the mechanisms governing hepatic sinusoidal hemodynamics remain elusive.
Zhukov O, Postnov DD, Hejn KH, Ravnskjaer K, Sosnovtseva O.   +4 more
europepmc   +4 more sources

Correction of overexposure in laser speckle contrast imaging

Optics 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, Máté Siket, Ádám Nagy, Imre Jánoki   +3 more
openaire   +4 more sources

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

Shanghai 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]

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, Imre Jánoki, Kssornél Demeter, Miklós Szabó, Péter Földesy   +4 more
openaire   +2 more sources

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, Xiaojun Cheng, Sefik Evren Erdener, David A. Boas   +3 more
openaire   +3 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]

Brazilian 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, G.O. Lopes, V. Verri, M.P. Coelho, P.M.C. Nascimento, D.A. Kopiler, E. Tibirica   +6 more
doaj   +3 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. 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, Kıvılcım Kılıç, Sefik Evren Erdener, David A. Boas, Dmitry D. Postnov   +4 more
openaire   +2 more sources

Enhancement of microvessel in laser speckle image using gaussian kernel template [PDF]

Journal of Innovative Optical Health Sciences, 2019
Laser speckle contrast imaging (LSCI) is an optical imaging method, which can monitor microvascular flow variation directly without addition of any ectogenous dye.
Yameng Zhang, Yuemei Zhao, Weitao Li, Zhiyu Qian, Lidong Xing   +4 more
doaj   +1 more source