Results 31 to 40 of about 4,592,774 (277)

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

Enhancing laser speckle reduction by decreasing the pitch of a chiral nematic liquid crystal diffuser

Scientific Reports, 2021
The artefact known as speckle can plague numerous imaging applications where the narrow linewidth of laser light is required, which includes laser projection and medical imaging.
David J. Hansford, Yihan Jin, Steve J. Elston, Stephen M. Morris   +3 more
doaj   +1 more source

A quantitative laser speckle-based velocity prediction approach using machine learning [PDF]

, 2023
Laser speckle contrast imaging (LSCI) can be applied to non-invasive blood perfusion measurement with high resolution and fast speed. However, it is lack of measurement accuracy.
Wu, Shuicai, Yixiong Chen, Stephen P. Morgan, Morgan, Stephen P., Shuicai Wu, Lan Lin, Sun, Shen, Shen Sun, Hao, Xiaoqi, Lin, Lan, Xiaoqi Hao, Chen, Yixiong   +11 more
core   +1 more source

Laser Speckle Modeling and Simulation for Biophysical Dynamics: Influence of Sample Statistics

Journal of Biomedical Photonics & Engineering, 2017
Laser speckle is a statistical phenomenon and should be treated as such when establishing experimental parameters for using laser speckle techniques to infer information about the dynamics of a coherently illuminated medium, such as biological tissue ...
Kosar Khaksari, Sean J. Kirkpatrick
doaj   +1 more source

Laser speckle contrast imaging compared with indocyanine green in renal perfusion of a porcine model

Current Urology, 2023
. Background. When viewed under near-infrared light, indocyanine green (ICG) signal for kidney perfusion can be utilized in partial nephrectomy. Laser speckle contrast imaging (LSCI) uses coherent light to detect perfusion during real-time laparoscopic ...
Jonathan Noël, Anya Mascarenhas, Chibueze A. Nwaiwu, Yao Liu, Marcio Moschovas, Vasiliy E. Buharin, John Oberlin, Saloni Mehrotra, Alyson F. Dechert, Peter C. W. Kim, Vipul Patel   +10 more
doaj   +1 more source

Grinding surface roughness measurement based on the co-occurrence matrix of speckle pattern texture [PDF]

, 2006
Surface speckle pattern intensity distribution resulting from laser light scattering from a rough surface contains various information about the surface geometrical and physical properties.A surface roughness measurement technique based on the texture ...
Gledhill, Duke, Ward, Steve, Lu, Rong-Sheng, Tian, Gui Yun, Lu, Rong Sheng   +4 more
core   +1 more source

Compound Speckle Reduction in Laser Imaging Systems by Using a Vibrating Multimode Fiber and a Tracked Moving Flexible DOE Loop

IEEE Access, 2021
The speckle phenomenon produced by coherent waves interfering with each other is undesirable in laser imaging systems. For each of the laser speckle reduction methods in the literature, it is difficult to reduce speckle to an extremely low level (<
Jun Zhou, Zichun Le, Zongshen Liu, Yanxin Dai, Yanyu Guo, Jiayu Deng, Jiapo Li   +6 more
doaj   +1 more source

Real-time quantification of bowel perfusion using Laparoscopic Laser Speckle Contrast Imaging (LSCI) in a porcine model

BMC Surgery, 2023
Background/purpose Real-time quantification of tissue perfusion can improve intraoperative surgical decision making. Here we demonstrate the utility of Laser Speckle Contrast Imaging as an intra-operative tool that quantifies real-time regional ...
Saloni Mehrotra, Yao Z. Liu, Chibueze A. Nwaiwu, Vasiliy E. Buharin, Roman Stolyarov, Steven D. Schwaitzberg, Matthew F. Kalady, Peter C. W. Kim   +7 more
doaj   +1 more source

Laser Speckle Contrast Imaging Based on a Mobile Phone Camera

IEEE Access, 2021
Laser speckle contrast imaging (LSCI) technology, a type of blood flow monitoring technology, has broad application prospects and has become an attractive subject of research.
Ping Kong, Hao Xu, Ran Li, Gang Huang, Wei Liu   +4 more
doaj   +1 more source

Influence of wavefront types on movement artefacts in handheld laser speckle contrast perfusion imaging [PDF]

, 2021
Laser speckle contrast imaging (LSCI) is a non-invasive and affordable technique to visualize skin perfusion. Handheld use of the system facilitates measurements on various skin areas in a flexible manner.
Chizari, Ata; id_orcid, Steenbergen, Wiendelt, Tsong, Wilson, Knop, Tom, Schwieters, Sven, Chizari, Ata   +5 more
core   +2 more sources