Results 81 to 90 of about 6,891,147 (192)

Estimation of myocardial deformation using correlation image velocimetry

BMC Medical Imaging, 2017
Background Tagged Magnetic Resonance (tMR) imaging is a powerful technique for determining cardiovascular abnormalities. One of the reasons for tMR not being used in routine clinical practice is the lack of easy-to-use tools for image analysis and strain
Athira Jacob, Ganapathy Krishnamurthi, Manikandan Mathur   +2 more
doaj   +1 more source

Validation of a Particle Image Velocimetry Algorithm Through Comparative Field and Laboratory Analysis

River Research and Applications, EarlyView.
ABSTRACT Flow velocity measurement is fundamental to hydrological and hydraulic studies, providing essential data for streamflow estimation and river dynamics analysis. Traditional in situ methods like propeller gauges and acoustic Doppler current profilers are accurate but intrusive and labour‐intensive, while non‐intrusive image processing methods ...
Ghazaleh Nassaji Matin, Gareth Bradbury, Alan Puttock, Kirsty Frith, Diego Panici   +4 more
wiley   +1 more source

Interobserver and intraobserver variability of fetal and maternal Doppler measurements: systematic review and meta‐analysis

Ultrasound in Obstetrics &Gynecology, EarlyView.
ABSTRACT Objectives To evaluate the variability and reproducibility of umbilical artery (UA), fetal middle cerebral artery (MCA) and uterine artery (UtA) Doppler ultrasound measurements in pregnancy. Methods A systematic search of MEDLINE, EMBASE and the Cochrane Library (CENTRAL) was conducted from inception to 17 June 2024.
L. I. Prins, N. El Guili, C. A. Naaktgeboren, N. P. Denswil, R. J. Burger, S. J. Gordijn, W. Ganzevoort   +6 more
wiley   +1 more source

Graph-enhanced neural operator for missing velocities reconstruction in river surface velocimetry

Machine Learning. Earth
Measuring river surface velocity is essential for estimating river discharge. While traditional image-based velocimetry methods are often effective, they struggle to produce complete velocity fields under complex environmental conditions. Factors such as
Xueqin Chen, Hessel Winsemius, Riccardo Taormina   +2 more
doaj   +1 more source

Mechanical stiffness orchestrates distinct regulation of MRTFs and YAP/TAZ transcriptional cofactors in hepatocytes

The FEBS Journal, EarlyView.
MRTFs and YAP/TAZ proteins, or mechanosensitive transcriptional cofactors (MRTcoF), regulate common genes associated with cellular contractility and immune cell infiltration. Their differential regulation in response to stiffness is linked to changes in hepatocyte's aspect ratio. MRTFB does not undergo nuclear translocation under these conditions. This
Brenda Selene Torres‐Ortiz, Daniel Pérez‐Calixto, Jorge Carretero‐Ortega, Aida Gabriela Guzman‐López, Diana Cristina Pinto‐Dueñas, Mariana Hernández‐Juárez, Alejandra Jiménez‐Escobar, Adriana Rodríguez‐Hernández, Beatriz Díaz‐Bello, Nathalia Serna‐Márquez, Miguel Ángel Peña‐Rico, Laura Gómez‐Romero, Francisco Gabriel Vázquez‐Cuevas, Genaro Vázquez‐Victorio   +13 more
wiley   +1 more source

Particle image velocimetry

, 1993
This document describes the development of a new flow visualization and measurement facility that incorporates a sheet of laser light and digital image enhancement and processing techniques. A simple bench test that was used to demonstrate the feasibility of such techniques is also described.
openaire   +3 more sources

Real-Time Measurement of Flash-Flood in a Wadi Area by LSPIV and STIV

Hydrology, 2019
Flash floods in wadi systems discharge large volumes of water to either the sea or the desert areas after high-intensity rainfall events. Recently, wadi flash floods have frequently occurred in arid regions and caused damage to roads, houses, and ...
Mahmood M. Al-mamari, Sameh A. Kantoush, Sohei Kobayashi, Tetsuya Sumi, Mohamed Saber   +4 more
doaj   +1 more source

Dense velocity reconstruction from particle image velocimetry/particle tracking velocimetry using a physics-informed neural network

The Physics of Fluids, 2022
Hongping Wang, Yi Liu, Shizhao Wang
semanticscholar   +1 more source

Comparative assessment of pressure field reconstructions from particle image velocimetry measurements and Lagrangian particle tracking

, 2017
A test case for pressure field reconstruction from particle image velocimetry (PIV) and Lagrangian particle tracking (LPT) has been developed by constructing a simulated experiment from a zonal detached eddy simulation for an axisymmetric base flow at ...
P. V. Gent, D. Michaelis, B. W. Oudheusden, P. Weiss, R. Kat, A. Laskari, Y. Jeon, L. David, D. Schanz, F. Huhn, S. Gesemann, M. Novara, C. McPhaden, N. Neeteson, D. Rival, J. Schneiders, F. Schrijer   +16 more
semanticscholar   +1 more source

Particle image velocimetry for combustion measurements: Applications and developments

Chinese Journal of Aeronautics, 2018
In the last several decades, Particle Image Velocimetry (PIV) has reached a high degree of maturity as a laser diagnostic technique based on tracer particles, with significant improvements in accuracy, resolution, dynamic range, and as an extension to ...
Fang Chen, Hong Liu
semanticscholar   +1 more source