Time‐resolved 3D cine phase‐contrast magnetic resonance imaging (4D‐flow MRI) can quantitatively assess portosystemic shunt severity and confirm normalization of portal flow after embolization of large portosystemic shunts

2021 ◽  
Author(s):  
Ryota Hyodo ◽  
Yasuo Takehara ◽  
Takashi Mizuno ◽  
Kazushige Ichikawa ◽  
Yoji Ishizu ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Resonance Imaging ◽  
4D Flow Mri ◽  
Portal Flow ◽  
4D Flow ◽  
Time Resolved ◽  
Portosystemic Shunts ◽  
Contrast Magnetic Resonance ◽  
Flow Mri ◽  
Cine Phase Contrast

scholarly journals Numerical simulation of time-resolved 3D phase-contrast magnetic resonance imaging

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0248816
Author(s):  
Thomas Puiseux ◽  
Anou Sewonu ◽  
Ramiro Moreno ◽  
Simon Mendez ◽  
Franck Nicoud
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Phase Contrast ◽  
Navier Stokes ◽  
Resonance Imaging ◽  
4D Flow Mri ◽  
4D Flow ◽  
Time Resolved ◽  
Contrast Magnetic Resonance ◽  
Flow Mri

A numerical approach is presented to efficiently simulate time-resolved 3D phase-contrast Magnetic resonance Imaging (or 4D Flow MRI) acquisitions under realistic flow conditions. The Navier-Stokes and Bloch equations are simultaneously solved with an Eulerian-Lagrangian formalism. A semi-analytic solution for the Bloch equations as well as a periodic particle seeding strategy are developed to reduce the computational cost. The velocity reconstruction pipeline is first validated by considering a Poiseuille flow configuration. The 4D Flow MRI simulation procedure is then applied to the flow within an in vitro flow phantom typical of the cardiovascular system. The simulated MR velocity images compare favorably to both the flow computed by solving the Navier-Stokes equations and experimental 4D Flow MRI measurements. A practical application is finally presented in which the MRI simulation framework is used to identify the origins of the MRI measurement errors.

Time-resolved 3-dimensional magnetic resonance phase contrast imaging (4D Flow MRI) reveals altered blood flow patterns in the ascending aorta of patients with valve-sparing aortic root replacement

2020 ◽  
Vol 159 (3) ◽  
pp. 798-810.e1 ◽  
Author(s):  
Thekla H. Oechtering ◽  
Malte M. Sieren ◽  
Peter Hunold ◽  
Anja Hennemuth ◽  
Markus Huellebrand ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Phase Contrast Imaging ◽  
4D Flow Mri ◽  
Contrast Imaging ◽  
4D Flow ◽  
Time Resolved ◽  
3 Dimensional ◽  
Flow Mri ◽  
Altered Blood ◽  
Blood Flow Patterns

scholarly journals Time-resolved 3-dimensional magnetic resonance phase contrast imaging (4D Flow MRI) analysis of hemodynamics in valve-sparing aortic root repair with an anatomically shaped sinus prosthesis

2016 ◽  
Vol 152 (2) ◽  
pp. 418-427.e1 ◽  
Author(s):  
Thekla H. Oechtering ◽  
Carl F. Hons ◽  
Malte Sieren ◽  
Peter Hunold ◽  
Anja Hennemuth ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Phase Contrast Imaging ◽  
4D Flow Mri ◽  
Contrast Imaging ◽  
4D Flow ◽  
Time Resolved ◽  
3 Dimensional ◽  
Flow Mri ◽  
Valve Sparing ◽  
Aortic Root Repair

scholarly journals ANALYSES OF INTRA-LEFT VENTRICULAR (LV) FLOW DYNAMICS IN PATIENTS WITH NORMAL AND IMPAIRED LV FUNCTION USING PHASE-RESOLVED 3D CINE PHASE-CONTRAST MRI (4D-FLOW MRI)

2014 ◽  
Vol 63 (12) ◽  
pp. A1252
Author(s):  
Kenichiro Suwa ◽  
Takeji Saitoh ◽  
Makoto Sano ◽  
Mamoru Nobuhara ◽  
Masao Saotome ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Left Ventricular ◽  
Flow Dynamics ◽  
Lv Function ◽  
4D Flow Mri ◽  
4D Flow ◽  
Phase Contrast Mri ◽  
Flow Mri ◽  
Cine Phase Contrast

In Vivo Quantification of Helical Blood Flow in Human Aorta by Time-Resolved Three-Dimensional Cine Phase Contrast Magnetic Resonance Imaging

2008 ◽  
Vol 37 (3) ◽  
pp. 516-531 ◽  
Author(s):  
Umberto Morbiducci ◽  
Raffaele Ponzini ◽  
Giovanna Rizzo ◽  
Marcello Cadioli ◽  
Antonio Esposito ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Blood Flow ◽  
Phase Contrast ◽  
Three Dimensional ◽  
Human Aorta ◽  
Resonance Imaging ◽  
Time Resolved ◽  
Contrast Magnetic Resonance ◽  
Cine Phase Contrast

Measurement of Absolute Epicardial Coronary Artery Flow and Flow Reserve With Breath-Hold Cine Phase-Contrast Magnetic Resonance Imaging

Circulation ◽  
1995 ◽  
Vol 91 (10) ◽  
pp. 2627-2634 ◽  
Author(s):  
Geoffrey D. Clarke ◽  
Robin Eckels ◽  
Curtis Chaney ◽  
Dorothy Smith ◽  
Jason Dittrich ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Coronary Artery ◽  
Magnetic Resonance ◽  
Phase Contrast ◽  
Breath Hold ◽  
Resonance Imaging ◽  
Flow Reserve ◽  
Contrast Magnetic Resonance ◽  
Artery Flow ◽  
Cine Phase Contrast

In Vivo Tracking of the Human Patella Using Cine Phase Contrast Magnetic Resonance Imaging

1999 ◽  
Vol 121 (6) ◽  
pp. 650-656 ◽  
Author(s):  
F. T. Sheehan ◽  
F. E. Zajac ◽  
J. E. Drace
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Knee Joint ◽  
Phase Contrast ◽  
Three Dimensional ◽  
Resonance Imaging ◽  
Contrast Magnetic Resonance ◽  
Knee Joint Kinematics ◽  
Cine Phase Contrast

Improper patellar tracking is often considered to be the cause of patellar-femoral pain. Unfortunately, our knowledge of patellar-femoral-tibial (knee) joint kinematics is severely limited due to a lack of three-dimensional, noninvasive, in vivo measurement techniques. This study presents the first large-scale, dynamic, three-dimensional, noninvasive, in vivo study of nonimpaired knee joint kinematics during volitional leg extensions. Cine-phase contrast magnetic resonance imaging was used to measure the velocity profiles of the patella, femur, and tibia in 18 unimpaired knees during leg extensions, resisted by a 34 N weight. Bone displacements were calculated through integration and then converted into three-dimensional orientation angles. We found that the patella displaced laterally, superiorly, and anteriorly as the knee extended. Further, patellar flexion lagged knee flexion, patellar tilt was variable, and patellar rotation was fairly constant throughout extension.

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