Results 211 to 220 of about 6,108,061 (222)

P21‐Activated Kinase 2 as a Novel Target for Ventricular Tachyarrhythmias Associated with Cardiac Adrenergic Stress and Hypertrophy

Advanced Science, EarlyView.
Ca2+/calmodulin‐dependent kinase II (CaMKII) activation is likely driven by oxidative stress, particularly excessive reactive oxygen species (ROS) production. This study identifies P21‐activated kinase 2 (Pak2) as a novel regulator of ROS‐induced CaMKII activation and abnormal Ca2⁺ dynamics in acute adrenergic and chronic pressure‐overload stressed ...
Tao Li, Ting Liu, Yan Wang, Yangpeng Li, Leiying Liu, James Bae, Yu He, Xian Luo, Zhu Liu, Tangting Chen, Xianhong Ou, Dan Zhang, Huan Lan, Juyi Wan, Yan Wei, Fang Zhao, Xin Wang, Tao Li, Christopher L.‐H. Huang, Chunxiang Zhang, Ming Lei, Xiaoqiu Tan   +21 more
wiley   +1 more source

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Advances in laser speckle imaging: From qualitative to quantitative hemodynamic assessment

Journal of Biophotonics, 2023
Laser speckle imaging (LSI) techniques have emerged as a promising method for visualizing functional blood vessels and tissue perfusion by analyzing the speckle patterns generated by coherent light interacting with living biological tissue.
Muhammad Mohsin Qureshi, Nader Allam, Jeon-Taek Im, Hyuk-Sang Kwon, Euiheon Chung, I. A. Vitkin   +5 more
semanticscholar   +1 more source

High‐Fidelity Image Reconstruction through Multimode Fiber via Polarization‐Enhanced Parametric Speckle Imaging

Laser & Photonics reviews, 2021
High‐quality signal transmission and imaging through a multimode fiber is essential for optical communications and medical endoscopic imaging, as it can provide high fidelity of the transferred information.
Weiru Fan, Ziyang Chen, V. Yakovlev, J. Pu   +3 more
semanticscholar   +1 more source

Multi‐wavelength, handheld laser speckle imaging for skin evaluation

Skin research and technology, 2020
A handheld device was developed and qualified for in vivo human skin evaluation using laser speckle imaging technology.
M. Zieger, M. Kaatz, Steffen Springer, R. Riesenberg, A. Wuttig, M. Kanka, S. Stanca, C. Reble, G. Khazaka, R. Sieg, Marco De Gregorio, M. Sattler, F. Fischer   +12 more
semanticscholar   +1 more source

Tracking Multiple Objects Outside the Line of Sight Using Speckle Imaging

2018 IEEE/CVF Conference on Computer Vision and Pattern Recognition, 2018
This paper presents techniques for tracking non-line-of-sight (NLOS) objects using speckle imaging. We develop a novel speckle formation and motion model where both the sensor and the source view objects only indirectly via a diffuse wall.
Brandon M. Smith, Matthew O'Toole, Mohit Gupta   +2 more
semanticscholar   +1 more source

NESSI and 'Alopeke: two new dual-channel speckle imaging instruments

Astronomical Telescopes + Instrumentation, 2018
NESSI and `Alopeke are two speckle imaging instruments for community use at the WIYN and Gemini-North telescopes. The two instruments were built at NASA ARC and include the capability for wide-field and traditional CCD imaging.
N. Scott, S. Howell
semanticscholar   +1 more source

Improving the estimation of flow speed for laser speckle imaging with single exposure time.

Optics Letters, 2017
Laser speckle contrast imaging is a full-field imaging technique for measuring blood flow by mapping the speckle contrast with high spatial and temporal resolution.
Yang Wang, Dong Wen, Xiao Chen, Qin Huang, Ming Chen, Jinling Lu, Pengcheng Li   +6 more
semanticscholar   +1 more source

Multimode Random Fiber Laser for Speckle-Free Imaging

IEEE Journal of Selected Topics in Quantum Electronics, 2019
Light sources with high radiance are increasingly required for full-field real-time imaging. Conventional lasing sources are poorly suited for such imaging due to their high spatial or temporal coherence, which generates a speckle that deteriorates image
R. Ma, Y. Rao, Wei Li Zhang, Bo Hu
semanticscholar   +1 more source

Evaluating multi-exposure speckle imaging estimates of absolute autocorrelation times.

Optics Letters, 2015
Multi-exposure speckle imaging (MESI) is a camera-based flow-imaging technique for quantitative blood-flow monitoring by mapping the speckle-contrast dependence on camera exposure duration.
S. S. Kazmi, R. K. Wu, A. Dunn
semanticscholar   +1 more source

Improving imaging depth by dynamic laser speckle imaging and topical optical clearing for in vivo blood flow monitoring

Lasers in Medical Science, 2020
X. Sang, Dong Li, Bin Chen
semanticscholar   +1 more source