Results 41 to 50 of about 10,506 (277)

Imaging depth and multiple scattering in laser speckle contrast imaging [PDF]

Journal of Biomedical Optics, 2014
Laser speckle contrast imaging (LSCI) is a powerful and simple method for full field imaging of blood flow. However, the depth dependence and the degree of multiple scattering have not been thoroughly investigated. We employ three-dimensional Monte Carlo simulations of photon propagation combined with high resolution vascular anatomy to investigate ...
Mitchell A, Davis, S M Shams, Kazmi, Andrew K, Dunn   +2 more
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

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

, 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

Development of computational algorithms for the analysis of contrast images in laser speckle imaging [PDF]

, 2022
Image processing and analysis acquire and enhance features using mathematical operations over neighboring pixels selected using a predetermined structure with a fixed shape or geometric form.
Eduardo Morales-Vargas
core  

Transmissive multifocal laser speckle contrast imaging through thick tissue

Journal of Innovative Optical Health Sciences, 2023
Laser speckle contrast imaging (LSCI) is a powerful tool for monitoring blood flow changes in tissue or vessels in vivo, but its applications are limited by shallow penetration depth under reflective imaging configuration.
Ruoyu Chen, Peng Miao, Shanbao Tong
doaj   +1 more source

Continuous hemodynamics monitoring during arteriovenous malformation microsurgical resection with laser speckle contrast imaging: case report. [PDF]

, 2023
AVM surgery is challenging due to progressive and often unforeseeable flow changes during its resection which involve both the AVM and the surrounding brain tissue. Hence, accurate monitoring of blood flow is crucial to minimize complications and improve
Dimanche, Alexis, Bervini, David, Goldberg, Johannes, Dunn, Andrew K, Raabe, Andreas, Miller, David R   +5 more
core   +1 more source

Multiexposure laser speckle contrast imaging of the angiogenic microenvironment [PDF]

Journal of Biomedical Optics, 2011
We report the novel use of laser speckle contrast imaging (LSCI) at multiple exposure times (meLSCI) for enhanced in vivo imaging of the microvascular changes that accompany angiogenesis. LSCI is an optical imaging technique that can monitor blood vessels and the flow therein at a high spatial resolution without requiring the administration of an ...
Abhishek, Rege, Kartikeya, Murari, Alan, Seifert, Arvind P, Pathak, Nitish V, Thakor   +4 more
openaire   +2 more sources

Laser speckle contrast imaging of abdominal organs in mouse model [PDF]

, 2019
Diagnosis and treatment of acute destructive pancreatitis is one of the most urgent problems of abdominal surgery. To obtain additional diagnostic information about the microcirculation state and metabolic processes, various imaging techniques are widely
Gennadii Piavchenko, Andrey Dunaev, Andrian Mamoshin, Dremin, V. (Viktor), Piavchenko, Gennadii, Kozlov, I. (Igor), Mamoshin, Andrian, Dunaev, A. (Andrey), Olga Stelmashchuk, Mezentsev, M. (Mikhail), Stelmashchuk, Olga, Piavchenko, G. (Gennadii), Mamoshin, A. (Andrian), Kozlov, Igor, Seryogina, E. (Evgenya), Anton Sdobnov, Viktor Dremin, Sdobnov, Anton, Stelmashchuk, O. (Olga), Seryogina, Evgenya, Dunaev, Andrey, Mezentsev, Mikhail, Mikhail Mezentsev, Igor Kozlov, Sdobnov, A. (Anton), Evgeniya Seryogina, Dremin, Viktor   +26 more
core   +1 more source

Exploration of movement artefacts in handheld laser speckle contrast perfusion imaging [PDF]

, 2020
Functional performance of handheld laser speckle contrast imaging (LSCI) is compromised by movement artefacts. Here we quantify the movements of a handheld LSCI system employing electromagnetic (EM) tracking and measure the applied translational, tilt ...
Chizari, Ata; id_orcid, Steenbergen, Wiendelt, van der Heijden, Ferdinand; id_orcid, van der Heijden, Ferdinand, Knop, Tom, Sirmacek, Beril, Chizari, Ata   +6 more
core   +1 more source

FOCUS: Flow dynamic and optical property coupled laser speckle imaging for quantitative blood flow mapping [PDF]

APL Photonics
Laser speckle contrast imaging (LSCI) provides label-free, wide-field blood-flow imaging with high spatiotemporal resolution, but its quantitative interpretation remains challenging because the measured speckle contrast is affected by both tissue optical
Shijie Feng, Tingyu Sun, Jiachi Hong, Junshuai Yan, Zimeng Xu, Alexander V. Priezzhev, Pengcheng Li, Jinling Lu   +7 more
doaj   +1 more source