Results 1 to 10 of about 23,270 (113)

Influence of Spatial Resolution and Compressed SENSE Acceleration Factor on Flow Quantification with 4D Flow MRI at 3 Tesla

Tomography, 2022
Four-dimensional (4D) flow MRI allows quantifying flow in blood vessels–non invasively and in vivo. The clinical use of 4D flow MRI in small vessels, however, is hampered by long examination times and limited spatial resolution.
Mariya S. Pravdivtseva, Franziska Gaidzik, Philipp Berg, Patricia Ulloa, Naomi Larsen, Olav Jansen, Jan-Bernd Hövener, Mona Salehi Ravesh   +7 more
doaj   +3 more sources

Recognition of hemodynamic change at a brief glance in Budd–Chiari syndrome by 4D flow MRI [PDF]

Radiology Case Reports
Budd–Chiari syndrome (BCS) is characterized by obstruction or stenosis of the major hepatic veins or the hepatic inferior vena cava (IVC). A man in his 30s with BCS, presenting with occlusion of the hepatic IVC and the right and left hepatic veins on ...
Minami Kinjo, MD, Nanae Tsuchiya, MD, PhD, Hitoshi Inafuku, MD, PhD, Tatsuya Maeda, MD, Yukari Tomori, MD, PhD, Akihiro Nishie, MD, PhD   +5 more
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Automated 4D flow MRI pipeline for the quantification of advanced hemodynamic parameters in the left atrium [PDF]

Scientific Reports
The left atrium (LA) plays a pivotal role in modulating left ventricular filling, yet its hemodynamics remain poorly understood due to the limitations of conventional ultrasound analysis.
Xabier Morales, Ayah Elsayed, Debbie Zhao, Filip Loncaric, Ainhoa Aguado, Mireia Masias, Gina Quill, Marc Ramos, Adelina Doltra, Ana García-Alvarez, Marta Sitges, David Marlevi, Alistair Young, Martyn Nash, Bart Bijnens, Oscar Camara   +15 more
doaj   +2 more sources

FlowMRI-Net: A generalizable self-supervised 4D flow MRI reconstruction network [PDF]

Journal of Cardiovascular Magnetic Resonance
: Background: Image reconstruction from highly undersampled four-dimensional (4D) flow magnetic resonance imaging (MRI) data can be very time-consuming and may result in significant underestimation of velocities depending on regularization, thereby ...
Luuk Jacobs, Marco Piccirelli, Valery Vishnevskiy, Sebastian Kozerke   +3 more
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A Fully Automated Analysis Pipeline for 4D Flow MRI in the Aorta [PDF]

Bioengineering
Four-dimensional (4D) flow MRI has shown promise for the assessment of aortic hemodynamics. However, data analysis traditionally requires manual and time-consuming human input at several stages. This limits reproducibility and affects analysis workflows,
Ethan M. I. Johnson, Haben Berhane, Elizabeth Weiss, Kelly Jarvis, Aparna Sodhi, Kai Yang, Joshua D. Robinson, Cynthia K. Rigsby, Bradley D. Allen, Michael Markl   +9 more
doaj   +2 more sources

Intracranial Flow Velocity Quantification Using Non-Contrast Four-Dimensional Flow MRI: A Prospective Comparative Study with Transcranial Doppler Ultrasound

Diagnostics, 2021
Four-dimensional (4D) flow magnetic resonance imaging (MRI) allows three-dimensional velocity encoding to measure blood flow in a single scan, regardless of the intracranial artery direction. We compared blood flow velocity quantification by non-contrast
Sam-Yeol Ha, Yeonah Kang, Ho-Joon Lee, Moonjung Hwang, Jiyeon Baik, Seongho Park   +5 more
doaj   +1 more source

Improving Blood Flow Visualization of Recirculation Regions at Carotid Bulb in 4D Flow MRI Using Semi-Automatic Segmentation with ITK-SNAP

Diagnostics, 2021
Assessment of carotid bulb hemodynamics using four-dimensional (4D) flow magnetic resonance imaging (MRI) requires accurate segmentation of recirculation regions that is frequently hampered by limited resolution.
Minh Tri Ngo, Ui Yun Lee, Hojin Ha, Jinmu Jung, Dong Hwan Lee, Hyo Sung Kwak   +5 more
doaj   +1 more source

Comparison of Four-Dimensional Flow Magnetic Resonance Imaging and Particle Image Velocimetry to Quantify Velocity and Turbulence Parameters

Fluids, 2021
Although recent advances of four-dimensional (4D) flow magnetic resonance imaging (MRI) has introduced a new way to measure Reynolds stress tensor (RST) in turbulent flows, its measurement accuracy and possible bias have remained to be revealed.
Doohyeon Kim, Jihun Kang, Ehsan Adeeb, Gyu-Han Lee, Dong Hyun Yang, Hojin Ha   +5 more
doaj   +1 more source

Cerebral hemodynamics comparison using transcranial doppler ultrasound and 4D flow MRI

Frontiers in Physiology, 2023
Introduction: Age-related changes in cerebral hemodynamics are controversial and discrepancies may be due to experimental techniques. As such, the purpose of this study was to compare cerebral hemodynamics measurements of the middle cerebral artery (MCA)
Brandon G. Fico, Kathleen B. Miller, Leonardo A. Rivera-Rivera, Leonardo A. Rivera-Rivera, Adam T. Corkery, Andrew G. Pearson, Nicole A. Loggie, Anna J. Howery, Howard A. Rowley, Howard A. Rowley, Kevin M. Johnson, Kevin M. Johnson, Sterling C. Johnson, Sterling C. Johnson, Oliver Wieben, Jill N. Barnes   +15 more
doaj   +1 more source

Coronary Flow Assessment Using Accelerated 4D Flow MRI With Respiratory Motion Correction

Frontiers in Bioengineering and Biotechnology, 2021
Magnetic resonance imaging (MRI) can potentially be used for non-invasive screening of patients with stable angina pectoris to identify probable obstructive coronary artery disease.
Carmen P. S. Blanken, Eric M. Schrauben, Eva S. Peper, Lukas M. Gottwald, Bram F. Coolen, Diederik F. van Wijk, Jan J. Piek, Gustav J. Strijkers, R. Nils Planken, Pim van Ooij, Aart J. Nederveen   +10 more
doaj   +1 more source