Results 51 to 60 of about 4,592,774 (277)

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

Coherent Matrix-Based Approach for Evaluation of First-Order Speckle Intensity Statistics and Its Application for Speckle Suppression

IEEE Photonics Journal, 2022
The existing approach for evaluating the statistical characteristics of speckle intensity distribution is applicable only to completely decorrelated laser beams.
Qiyong Xu, Anatoliy Lapchuk, Zichun Le, Di Cai, Jun Zhou, Zongshen Liu, Ivan Gorbov, Andriy Kryuchyn   +7 more
doaj   +1 more source

Vessel packaging effect in laser speckle contrast imaging and laser Doppler imaging [PDF]

Journal of Biomedical Optics, 2017
Laser speckle-based techniques are frequently used to assess microcirculatory blood flow. Perfusion estimates are calculated either by analyzing the speckle fluctuations over time as in laser Doppler flowmetry (LDF), or by analyzing the speckle contrast as in laser speckle contrast imaging (LSCI).
Ingemar, Fredriksson, Marcus, Larsson
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   +2 more sources

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

, 2022
Movement artefacts distort handheld measurements of laser speckle contrast imaging (LSCI). Enabling a robust LSCI in handheld use brings convenience for both patients and clinical staff.
Steenbergen, Wiendelt, Tsong, Wilson, Knop, Tom, Wang, Ruikang K., Chizari, Ata, Tuchin, Valery V., Leahy, Martin J.   +6 more
core   +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

The dependence of speckle contrast on velocity: a numerical study

Journal of the European Optical Society-Rapid Publications, 2022
We study how the speckle contrast depends on scatterer velocity, with the goal of further developing laser speckle imaging as a quantitative measurement technique. To that end, we perform interferometric computer simulations on a dilute plug flow.
van As Kevin, Simons Bram A., Kleijn Chris R., Kenjeres Sasa, Bhattacharya Nandini   +4 more
doaj   +1 more source

Characteristics of blood flow measurements using laser speckle imaging [PDF]

, 2006
P(論文)Three types of blood flow measurement methods using laser irradiation such as laser-Doppler flowmetry, laser-Doppler imaging, and laser speckle imaging have been utilized for measuring the peripheral blood flow because of the benefits of low ...
新岡, 丈治, 渡邉, 秀和, 32591, 32592, 32590, WATANABE, Hidekazu, 石井, 久淑, 32584, IZUMI, Hiroshi, 32585, ISHII, Hisayoshi, 32582, 和泉, 博之, 32593, 32583, NIIOKA, Takeharu   +15 more
core  

Peripheral Neutrophil Activation and Extracellular Trap Formation in Amyotrophic Lateral Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
Markers of neutrophil activation are increased in plasma during ALS, and markers of NET formation associate with ALS survival. ABSTRACT Objectives Peripheral neutrophil levels in amyotrophic lateral sclerosis (ALS) inversely correlate with survival, suggesting a role for neutrophils in disease progression.
Lillia A. Baird, Haley McQuown, Jihyun Park, Samuel J. Teener, Ian F. Webber‐Davis, Andrew D. Carter, Dae‐Gyu Jang, Eva L. Feldman, Stephen A. Goutman, Benjamin J. Murdock   +9 more
wiley   +1 more source