Numerical simulations of phase contrast velocity mapping of complex flows in an anatomically realistic bypass graft geometry
- 26 June 2006
- journal article
- Published by Wiley in Medical Physics
- Vol. 33 (7Part1), 2621-2631
- https://doi.org/10.1118/1.2208931
Abstract
Combined in vitro experiments and numerical simulations were performed to study flow artifacts in phase contrast (PC) velocity mapping of steady flow through an anatomically realistic aortocoronary bypass graft model. The geometry was obtained through imaging and computational reconstruction of a left anterior descending (LAD) coronary artery of a porcine heart. Simulated images of through-plane velocity were obtained at selected slices of the geometry. These were then compared and contrasted with velocity images of corresponding sites that were obtained from in vitro experiments. The shift and distortion of the measured velocity profile was well predicted by the simulation, while trajectories obtained from particle tracking were shown to be useful in understanding the origins of the flow artifacts that were observed.Keywords
This publication has 13 references indexed in Scilit:
- A numerical study of magnetic resonance images of pulsatile flow in a two dimensional carotid bifurcation: A numerical study of MR imagesMedical Engineering & Physics, 1998
- Combined analysis of spatial and velocity displacement artifacts in phase contrast measurements of complex flowsJournal of Magnetic Resonance Imaging, 1997
- Calculation of the magnetization distribution for fluid flow in curved vesselsMagnetic Resonance in Medicine, 1996
- MR imaging of flow through tortuous vessels: A numerical simulationMagnetic Resonance in Medicine, 1994
- A method for registration of 3-D shapesIEEE Transactions on Pattern Analysis and Machine Intelligence, 1992
- Signal‐to‐noise in phase angle reconstruction: Dynamic range extension using phase reference offsetsMagnetic Resonance in Medicine, 1990
- The application of phase shifts in NMR for flow measurementMagnetic Resonance in Medicine, 1990
- Measurement of Flow with NMR Imaging Using a Gradient Pulse and Phase Difference TechniqueJournal of Computer Assisted Tomography, 1984
- Direct Cardiac NMR Imaging of Heart Wall and Blood Flow VelocityJournal of Computer Assisted Tomography, 1984
- A flow velocity zeugmatographic interlace for NMR imaging in humansMagnetic Resonance Imaging, 1982