Results 21 to 30 of about 13,509 (286)

Studies of <i>in vivo</i> speckle contrast imaging based on an improved laser speckle imaging method. [PDF]

J Biomed Opt
Laser speckle contrast imaging (LSCI) is widely used for intraoperative blood flow monitoring, but traditional methods have limitations in imaging low blood flow velocities and small vessels. An improved LSCI method, termed the fluent imaging technique, is proposed to enhance imaging sensitivity and accuracy, providing real-time and high-resolution ...
Han G, Yang Q, Zeng R, Liu S, Wu Y, Chen R, Wang H, Zhang J.   +7 more
europepmc   +3 more sources

Handheld motion stabilized laser speckle imaging. [PDF]

Biomed Opt Express, 2019
Laser speckle imaging (LSI) is a wide-field, noninvasive optical technique that allows researchers and clinicians to quantify blood flow in a variety of applications. However, traditional LSI devices are cart or tripod based mounted systems that are bulky and potentially difficult to maneuver in a clinical setting.
Lertsakdadet B, Dunn C, Bahani A, Crouzet C, Choi B.   +4 more
europepmc   +5 more sources

Physics-Informed Generative Adversarial Networks for Laser Speckle Noise Suppression

Sensors
In high-resolution microscopic imaging, using shorter-wavelength ultraviolet (UV) lasers as illumination sources is a common approach. However, the high spatial coherence of such lasers, combined with the surface roughness of the sample, often introduces
Xiangji Guo, Fei Xie, Tingkai Yang, Ming Ming, Tao Chen   +4 more
doaj   +2 more sources

Dual-Wavelength Confocal Laser Speckle Contrast Imaging Using a Deep Learning Approach

Photonics
This study developed a novel dual-wavelength confocal laser speckle imaging platform. The system includes both visible and near-infrared lasers and two imaging modes: confocal and wide-field laser speckle contrast imaging.
E Du, Haohan Zheng, Honghui He, Shiguo Li, Cong Qiu, Weifeng Zhang, Guoqing Wang, Xingquan Li, Lan Ma, Shuhao Shen, Yuan Zhou   +10 more
doaj   +2 more sources

A ghost imaging framework based on laser mode speckle pattern for underwater environments

Communications Engineering
Due to the complex physical processes found in underwater environments, such as absorption, scattering, and noise, it is challenging to obtain high-quality images using conventional camera-based imaging techniques.
Mo-Chou Yang, Peng Wang, Yi Wu, Guo-Ying Feng   +3 more
doaj   +2 more sources

Improving Laser Speckle Imaging Technology

, 2022
I work at the Institute for Computer Science and Control (SZTAKI), where my research group recently started to explore the field of laser speckle imaging with a focus on improving Laser Speckle Contrast Imaging (LSCI). The method is based on the laser speckle phenomenon, which is in fact the interference pattern of backscattered coherent light.
Imre Janoki
openaire   +2 more sources

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

Speckles in laser Doppler perfusion imaging [PDF]

Optics Letters, 2006
We report on the quantitative influence of speckles in laser Doppler perfusion imaging. The influence of speckles on the signal amplitude and on the Doppler spectrum is demonstrated experimentally for particle suspensions with different scattering levels and various beam widths.
Rajan, V., Varghese, B., van Leeuwen, T. G., Steenbergen, W.   +3 more
openaire   +2 more sources

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

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