Results 61 to 70 of about 396,810 (295)

Quality Control for 4D Flow MR Imaging

Magnetic Resonance in Medical Sciences, 2022
In recent years, 4D flow MRI has become increasingly important in clinical applications for the blood vessels in the whole body, heart, and cerebrospinal fluid. 4D flow MRI has advantages over 2D cine phase-contrast (PC) MRI in that any targeted area of interest can be analyzed post-hoc, but there are some factors to be considered, such as ensuring ...
Isoda, Haruo, Fukuyama, Atsushi
openaire   +3 more sources

Physics-informed neural networks in computational fluid dynamics : enhancing 4D flow MRI data

, 2022
LAUREA MAGISTRALEIn questa tesi, proponiamo alcuni algoritmi di Machine Learning per migliorare delle misure di velocità in emodinamica. In particolare, utilizziamo le Physics-Informed Neural Networks (PINNs), in contesto di Scientific Machine Learning,
Tirotta, Raffaele
core  

Rapid slice-to-volume four-dimensional flow in pediatric congenital heart disease: a feasibility study

Journal of Cardiovascular Magnetic Resonance
: Background: Cardiovascular magnetic resonance (CMR) allows cardiac hemodynamic assessment in patients with congenital heart disease (CHD). However, conventional techniques are time-consuming and may require blood contrast agents.
Valérie Béland, Datta Singh Goolaub, Sharon Portnoy, Shi-Joon Yoo, Christopher Z. Lam, Christopher K. Macgowan   +5 more
doaj   +1 more source

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

FEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson, Tomáš Gedeon, Mauricio Garcia Benitez, Campbell Putnam, William R. Harcombe, Radhakrishnan Mahadevan, Ashley E. Beck   +6 more
wiley   +1 more source

4D FLOW CMR in congenital heart disease [PDF]

, 2023
This thesis showed that the use of a cloud-based reconstruction applicationwith advanced eddy currents correction, integrated with interactiveimaging evaluation tools allowed for remote visualization and interpretationof 4D flow data and that was ...
Chelu, Raluca
core   +3 more sources

Comparison of 4D Flow MRI to 2D Flow MRI in the pulmonary arteries in healthy volunteers and patients with pulmonary hypertension.

PLoS ONE, 2019
PURPOSE:4D and 2D phase-contrast MRI (2D Flow MRI, 4D Flow MRI, respectively) are increasingly being used to noninvasively assess pulmonary hypertension (PH).
Malte Maria Sieren, Clara Berlin, Thekla Helene Oechtering, Peter Hunold, Daniel Drömann, Jörg Barkhausen, Alex Frydrychowicz   +6 more
doaj   +1 more source

A Systematic Review of 4D-Flow MRI Derived Mitral Regurgitation Quantification Methods

Frontiers in Cardiovascular Medicine, 2019
Background: Four-dimensional flow cardiac magnetic resonance (4D flow CMR) is an emerging non-invasive imaging technology that can be used to quantify mitral regurgitation (MR) volume.
Benjamin Fidock, Natasha Barker, Nithin Balasubramanian, Gareth Archer, Graham Fent, Abdullah Al-Mohammad, James Richardson, Laurence O'Toole, Norman Briffa, Norman Briffa, Alexander Rothman, Rob van der Geest, Rod Hose, James M. Wild, Andrew J. Swift, Pankaj Garg, Pankaj Garg   +16 more
doaj   +1 more source

Automated 4D flow cardiac MRI pipeline to derive peak mitral inflow diastolic velocities using short-axis cine stack: two centre validation study against echocardiographic pulse-wave doppler

BMC Cardiovascular Disorders, 2023
Background Measurement of peak velocities is important in the evaluation of heart failure. This study compared the performance of automated 4D flow cardiac MRI (CMR) with traditional transthoracic Doppler echocardiography (TTE) for the measurement of ...
Hosamadin Assadi, Rui Li, Ciaran Grafton-Clarke, Bhalraam Uthayachandran, Samer Alabed, Ahmed Maiter, Gareth Archer, Peter P. Swoboda, Chris Sawh, Alisdair Ryding, Faye Nelthorpe, Bahman Kasmai, Fabrizio Ricci, Rob J. van der Geest, Marcus Flather, Vassilios S. Vassiliou, Andrew J. Swift, Pankaj Garg   +17 more
doaj   +1 more source

Four-Dimensional Flow MRI for the Evaluation of Aortic Endovascular Graft: A Pilot Study

Diagnostics, 2023
We aimed to explore the feasibility of 4D flow magnetic resonance imaging (MRI) for patients undergoing thoracic aorta endovascular repair (TEVAR). We retrospectively evaluated ten patients (two female), with a mean (±standard deviation) age of 61 ± 20 ...
Paolo Righini, Francesco Secchi, Daniela Mazzaccaro, Daniel Giese, Marina Galligani, Dor Avishay, Davide Capra, Caterina Beatrice Monti, Giovanni Nano   +8 more
doaj   +1 more source

4D blood flow visualization fusing 3D and 4D MRA image sequences [PDF]

Journal of Magnetic Resonance Imaging, 2012
AbstractPurpose:To present and evaluate the feasibility of a novel automatic method for generating 4D blood flow visualizations fusing high spatial resolution 3D and time‐resolved (4D) magnetic resonance angiography (MRA) datasets.Materials and Methods:In a first step, the cerebrovascular system is segmented in the 3D MRA dataset and a surface model is
Nils Daniel, Forkert, Jens, Fiehler, Till, Illies, Dietmar P F, Möller, Heinz, Handels, Dennis, Säring   +5 more
openaire   +2 more sources