Results 41 to 50 of about 396,810 (295)

4D flow MRI: value and clinical perspectives in patients with pathology of the heart and great vessels. A review [PDF]

Терапевтический архив
The study of blood flow is becoming a new trend in cardiology and cardiovascular surgery. Based on the literature and our own data, a review is presented on the use of 4D flow in diseases of the heart and blood vessels.
Lyudmila A. Yurpolskaya
doaj   +1 more source

Tricuspid flow and regurgitation in congenital heart disease and pulmonary hypertension: comparison of 4D flow cardiovascular magnetic resonance and echocardiography

Journal of Cardiovascular Magnetic Resonance, 2018
Background Tricuspid valve (TV) regurgitation (TR) is a common complication of pulmonary hypertension and right-sided congenital heart disease, associated with increased morbidity and mortality.
Mieke M. P. Driessen, Marjolijn A. Schings, Gertjan Tj Sieswerda, Pieter A. Doevendans, Erik H. Hulzebos, Marco C. Post, Repke J. Snijder, Jos J. M. Westenberg, Arie P. J. van Dijk, Folkert J. Meijboom, Tim Leiner   +10 more
doaj   +1 more source

4D-Flow MRI: Technique and Applications [PDF]

RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren, 2018
Background Blood flow through the cavities of the heart and great vessels is pulsatile and is subject to time and multidirectional variations. To date, the recording of blood flow in multiple directions and phases has been limited. 4D-flow MRI offers advantages for the recording, visualization and analysis of blood flow. Method 
Alexandra, Sträter, Armin, Huber, Jan, Rudolph, Maria, Berndt, Michael, Rasper, Ernst J, Rummeny, Jonathan, Nadjiri   +6 more
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Maximally supersymmetric RG flows in 4D and integrability [PDF]

Journal of High Energy Physics, 2021
Abstract We revisit the leading irrelevant deformation of $$ \mathcal{N} $$ N = 4 Super Yang-Mills theory that preserves sixteen supercharges. We consider the deformed theory on S3× ℝ. We are able to write a closed form expression of the classical action thanks to a formalism that realizes eight ...
Caetano, João, Peelaers, Wolfger, Rastelli, Leonardo   +2 more
openaire   +4 more sources

4D flow MRI in abdominal vessels: prospective comparison of k-t accelerated free breathing acquisition to standard respiratory navigator gated acquisition

Scientific Reports, 2022
Volumetric phase-contrast magnetic resonance imaging with three-dimensional velocity encoding (4D flow MRI) has shown utility as a non-invasive tool to examine altered blood flow in chronic liver disease.
Octavia Bane, Daniel Stocker, Paul Kennedy, Stefanie J. Hectors, Emilie Bollache, Susanne Schnell, Thomas Schiano, Swan Thung, Aaron Fischman, Michael Markl, Bachir Taouli   +10 more
doaj   +1 more source

{4D} Model Flow: {P}recomputed Appearance Alignment for Real-time {4D} Video Interpolation [PDF]

, 2015
We introduce the concept of 4D model flow for the precomputed alignment of dynamic surface appearance across 4D video sequences of different motions reconstructed from multi-view video.
Richardt, C., Christian, Theobalt, Casas, D., Collomosse, John, Theobalt, C. ; https://orcid.org/, Casas, Dan, Richardt, Christian, Collomosse, J., Hilton, A., Hilton, Adrian   +9 more
core   +2 more sources

4DFlowNet: Super-Resolution 4D Flow MRI Using Deep Learning and Computational Fluid Dynamics

Frontiers in Physics, 2020
4D flow magnetic resonance imaging (MRI) is an emerging imaging technique where spatiotemporal 3D blood velocity can be captured with full volumetric coverage in a single non-invasive examination.
Edward Ferdian, Avan Suinesiaputra, Avan Suinesiaputra, David J. Dubowitz, Debbie Zhao, Alan Wang, Alan Wang, Brett Cowan, Brett Cowan, Alistair A. Young, Alistair A. Young   +10 more
doaj   +1 more source

Technical Background for 4D Flow MR Imaging

Magnetic Resonance in Medical Sciences, 2022
Recently, the hemodynamic assessments with 3D cine phase-contrast (PC) MRI (4D flow MRI) have attracted considerable attention from clinicians. Unlike 2D cine PC MRI, the technique allows for cardiac phase-resolved data acquisitions of flow velocity vectors within the entire FOV during a clinically viable period.
Terada, Masaki, Takehara, Yasuo, Isoda, Haruo, Wakayama, Tetsuya, Nozaki, Atsushi   +4 more
openaire   +3 more sources

Hemodynamic changes in the portal vein with age: evaluation using four-dimensional flow MRI

Scientific Reports, 2023
Aging process is associated with gradual change of liver function and structure. The goal of this study was to evaluate age-related hemodynamic changes in the portal vein (PV) using four-dimensional (4D) flow MRI in healthy adults. A total of 120 healthy
Chung-Man Moon, Seul-Kee Kim, Suk‑Hee Heo, Sang-Soo Shin   +3 more
doaj   +1 more source

4D Dual-Venc Spiral Flow.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference, 2018
Dual-Venc flow acquisition sequences perform flow imaging with differing Vencs. The technique can be used to improve velocity to noise ratio and image quality for diastolic flow velocities as part of a single scan. In this paper, Dual-Venc was used in conjunction with spiral read-out trajectories, offering a faster coverage of k-space.
Sean Callahan, Alex Henn, Michael Kendrick, Hui Wang 0105, M. J. Negahdar, Arash Kheradvar, Marcus F. Stoddard, Amir A. Amini   +7 more
openaire   +4 more sources