Results 61 to 70 of about 3,006,027 (287)

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   +2 more sources

Speckle Theory for Arbitrary Wavefront Illumination in Free-Space Surface Scattering

IEEE Photonics Journal
Speckle has been shown to cause significant degradation to the imaging quality of laser imaging systems. However, in certain complex imaging environments, it can also act as an effective information carrier.
Qiyong Xu, Janan Zhou, Yipeng Mo, Zichun Le   +3 more
doaj   +1 more source

Comparing laser speckle contrast imaging and indocyanine green angiography for assessment of parathyroid perfusion

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, Naira Baregamian, Giju Thomas, Carmen C. Solόrzano, Anita Mahadevan-Jansen   +4 more
doaj   +1 more source

Dynamic Laser Speckle Imaging [PDF]

, 2019
ABSTRACT Utilizing a high-speed camera and recording back-scattered laser light at more than 20,000 frames per second, we introduce the first wide-field dynamic laser speckle imaging (DLSI) in which we are able to quantify the laser speckleintensity temporal auto-correlation function g
Postnov, Dmitry D., Tang, Jianbo, Erdener, Sefik Evren, Kılıç, Kıvılcım, Boas, David A.   +4 more
openaire   +1 more source

Mutant p53R273H disrupts PDPK1 homodimerization and contributes to PDPK1 activation

Molecular Oncology, EarlyView.
How mutant p53R273H drives AKT signaling is unclear. We show that p53R273H, but not wild‐type, directly binds PDPK1 via a mutation‐dependent conformational change. This interaction disrupts inhibitory PDPK1 homodimerization and enhances AKT phosphorylation.
Mei Chee Lim, Alvin Kunyao Guo, Yoko Itahana, Srinivasaraghavan Kannan, Valerie Goh, Mingmin Ong, Terina Yan Wen Tay, Weiying Ye, Sabhashina Radha Krishnan, Jun Nishiyama, Chandra S Verma, Koji Itahana   +11 more
wiley   +1 more source

Video 2 laser speckle contrast perfusion imaging of a psoriasis lesion in handheld mode

, 2022
Laser speckle contrast perfusion imaging of a psoriasis lesion in handheld mode.
Ata Chizari (7830899)
core   +1 more source

Confocal laser speckle time-autocorrelation imaging with adaptive orientation spatial windows

Journal of Innovative Optical Health Sciences
Conventional laser speckle contrast imaging (LSCI) suffers from static scattering and limited quantitative accuracy. To overcome these issues, we previously developed confocal laser speckle contrast imaging (CLSCI) and confocal laser speckle ...
E. Du, Haohan Zheng, Honghui He, Zhipeng Huang, Weizu Zhang, Shiguo Li, Weifeng Zhang, Guoqing Wang, Yuan Zhou, Tingxue Xin, Shuhao Shen   +10 more
doaj   +1 more source

A new flow chip in combination with multiphoton microscopy as a protocol for longitudinal 3D imaging of tissue calcification under shear stress

FEBS Open Bio, EarlyView.
Miniaturized flow chip platform enabling continuous perfusion and longitudinal multiphoton 3D imaging of vascular smooth muscle cell constructs under physiological flow. Brightfield imaging guides region selection, while CellTracker Green and mRuby‐labeled fetuin‐A visualize cells and mineral deposition, respectively. Magnesium supplementation markedly
Vytautas Kučikas, Aaron D. Morgan, Ignas Čiurlionis, Christian Böhm, Stefan Jockenhövel, Willi Jahnen‐Dechent, Marc A. M. J. van Zandvoort   +6 more
wiley   +1 more source

Laser speckle reduction using polymer-stabilized liquid crystals doped with Ag nanowires

Heliyon, 2023
Miniaturized and pure static devices are expected to be used in laser-imaging systems for speckle reduction. In this study, a pure static device based on polymer-stabilized liquid crystal (PSLC) doped with Ag nanowires was developed to effectively ...
Xin Jiang, Weilong Zhou, Wei Wang, Zichun Le, Wen Dong   +4 more
doaj   +1 more source

Handheld, point-of-care laser speckle imaging. [PDF]

J Biomed Opt, 2016
Laser speckle imaging (LSI) enables measurement of relative changes in blood flow in biological tissues. We postulate that a point-of-care form factor will lower barriers to routine clinical use of LSI. Here, we describe a first-generation handheld LSI device based on a tablet computer.
Farraro R, Fathi O, Choi B.
europepmc   +6 more sources