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Updated: Feb 24, 2026
In vitro Assessment of Aortic Regurgitation Using Four-Dimensional Flow Magnetic Resonance Imaging
Published on: February 25, 2022
Impact of Partial Echo on 4D Flow MRI: The Insight From Synthetic MRI
Morgane Garreau1,2,3, Thomas Puiseux2,4, Ramiro Moreno4,5
1IMAG, University of Montpellier, CNRS, Montpellier, France.
Purpose:
The aim of this study is to investigate the impact of the partial echo on 4D flow MRI sequences thanks to in silico coupled MRI-CFD (computational fluid dynamics) simulations.
Methods:
Two sequences are studied: one with a full echo (FE) and another using partial echo (PE) with an echo symmetry fraction of 0.75. MRI-CFD simulations are conducted on an in silico pulsatile flow phantom for a sinusoidal inflow and a physiological inflow typical of the ascending aorta.
Results:
For both inflow signals, PE-based simulations exhibited better compliance with their matching CFD simulations compared to the FE ones.
Conclusion:
The reduction of flow misregistration artifacts achieved through the use of PE appears to be more beneficial than the drawback of incomplete k-space filling. The MRI-CFD framework presented in this study appears as a useful tool to investigate the design of MRI sequences and to stratify its different sources of errors.
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