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Journal of Magnetic Resonance Imaging, 2012 AbstractTraditionally, magnetic resonance imaging (MRI) of flow using phase contrast (PC) methods is accomplished using methods that resolve single‐directional flow in two spatial dimensions (2D) of an individual slice. More recently, three‐dimensional (3D) spatial encoding combined with three‐directional velocity‐encoded phase contrast MRI (here ...
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Abdominal applications of quantitative 4D flow MRI
Abdominal Radiology, 20214D flow MRI is a quantitative MRI technique that allows the comprehensive assessment of time-resolved hemodynamics and vascular anatomy over a 3-dimensional imaging volume. It effectively combines several advantages of invasive and non-invasive imaging modalities like ultrasound, angiography, and computed tomography in a single MRI acquisition and ...
Thekla H. Oechtering +5 more
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On the limitations of echo planar 4D flow MRI
Magnetic Resonance in Medicine, 2020PurposeTo compare EPI and GRE readout in high‐flow velocity regimes and evaluate their impact on measurement accuracy in silico and in vitro.Theory and MethodsPhase‐contrast sequences for EPI and GRE were simulated using CFD velocity data to assess displacement artifacts as well as effective spatial resolution.
Dillinger, Hannes +2 more
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Topics in Magnetic Resonance Imaging, 2016
Assessment of the intracranial flow is important for the understanding and management of cerebral vascular diseases. From brain aneurysms and arteriovenous malformations lesions to intracranial and cervical stenosis, the appraisal of the blood flow can be crucial and influence positively on patients' management.
Mendes Pereira, Vitor +4 more
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Assessment of the intracranial flow is important for the understanding and management of cerebral vascular diseases. From brain aneurysms and arteriovenous malformations lesions to intracranial and cervical stenosis, the appraisal of the blood flow can be crucial and influence positively on patients' management.
Mendes Pereira, Vitor +4 more
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The Role of Imaging of Flow Patterns by 4D Flow MRI in Aortic Stenosis
JACC: Cardiovascular Imaging, 2019 Aortic valve stenosis (AS) is the most prevalent valvular heart disease in developed countries and is associated with the development of severe secondary complications such as aortic dilatation and aneurysm. Emerging evidence suggests that the modified hemodynamic environment associated with AS can cause altered flow patterns in the ascending aorta ...
Julio Garcia +2 more
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Automated hemodynamic assessment for cranial 4D flow MRI
Magnetic Resonance Imaging, 2023Cranial 4D flow MRI post-processing typically involves manual user interaction which is time-consuming and associated with poor repeatability. The primary goal of this study is to develop a robust quantitative velocity tool (QVT) that utilizes threshold-based segmentation techniques to improve segmentation quality over prior approaches based on ...
Grant S, Roberts +5 more
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2017
4D flow is a unique technique to measure the in vivo blood velocity vector spatially and temporally resolved. It allows deriving important hemodynamic parameters such as peak velocity, net flow, wall shear stress, and others, which are important parameters for a large range of diseases.
Sebastian Schmitter, Susanne Schnell
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4D flow is a unique technique to measure the in vivo blood velocity vector spatially and temporally resolved. It allows deriving important hemodynamic parameters such as peak velocity, net flow, wall shear stress, and others, which are important parameters for a large range of diseases.
Sebastian Schmitter, Susanne Schnell
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Comparison of turbulent flow measurement schemes for 4D flow MRI
Journal of Visualization, 2019Recently, time-resolved 3D phase contrast magnetic resonance imaging, which is also called 4D flow MRI or 4D PC-MRI, has been widely utilized to investigate spatial and temporal variations in the hemodynamic characteristics of blood flows. The conventional 4D flow MRI only provides the ensemble-averaged mean flow information but misses flow fluctuation
Hojin Ha, Hanwook Park
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4D Flow MRI of the Thoracic Aorta
Radiology: Cardiothoracic ImagingThis review highlights selected applications and future directions of four-dimensional flow MRI in the thoracic aorta.
David Dushfunian +3 more
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Sketch-based Registration of 3D Cine MRI to 4D flow MRI
Proceedings of the 2019 11th International Conference on Bioinformatics and Biomedical Technology, 2019Cardiac 4D Flow magnetic resonance imaging (4D Flow MRI) is a recent powerful technology that uniquely enables in-vivo acquisition of time-varying volumetric blood flow velocity field information in the three spatial dimensions over the cardiac cycle.
Samin Sabokrohiyeh +3 more
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