Time-Resolved 3-Dimensional Velocity Mapping in the Thoracic Aorta
- 1 January 2004
- journal article
- Published by Ovid Technologies (Wolters Kluwer Health) in Journal of Computer Assisted Tomography
- Vol. 28 (4), 459-468
- https://doi.org/10.1097/00004728-200407000-00005
Abstract
An analysis of thoracic aortic blood flow in normal subjects and patients with aortic pathologic findings is presented. Various visualization tools were used to analyze blood flow patterns within a single 3-component velocity volumetric acquisition of the entire thoracic aorta Time-resolved, 3-dimensional phase-contrast magnetic resonance imaging (3D CINE PC MRI) was employed to obtain complete spatial and temporal coverage of the entire thoracic aorta combined with spatially registered 3-directional pulsatile blood flow velocities. Three-dimensional visualization tools, including time-resolved velocity vector fields reformatted to arbitrary 2-dimensional cut planes, 3D streamlines, and time-resolved 3D particle traces, were applied in a study with 10 normal volunteers. Results from 4 patient examinations with similar scan prescriptions to those of the volunteer scans are presented to illustrate flow features associated with common pathologic findings in the thoracic aorta. Previously reported blood flow patterns in the thoracic aorta, including right-handed helical outflow, late systolic retrograde flow, and accelerated passage through the aortic valve plane, were visualized in all volunteers. The effects of thoracic aortic disease on spatial and temporal blood flow patterns are illustrated in clinical cases, including ascending aortic aneurysms, aortic regurgitation, and aortic dissection. Time-resolved 3D velocity mapping was successfully applied in a study of 10 healthy volunteers and 4 patients with documented aortic pathologic findings and has proven to be a reliable tool for analysis and visualization of normal characteristic as well as pathologic flow features within the entire thoracic aorta.Keywords
This publication has 37 references indexed in Scilit:
- Fast phase contrast cardiac magnetic resonance imaging: Improved assessment and analysis of left ventricular wall motionJournal of Magnetic Resonance Imaging, 2002
- Myocardial velocity gradient imaging by phase contrast MRI with application to regional function in myocardial ischemiaMagnetic Resonance in Medicine, 1999
- MRI of myocardial function: motion tracking techniquesMagnetic Resonance Imaging, 1996
- Analysis of MR phase‐contrast measurements of pulsatile velocity waveformsJournal of Magnetic Resonance Imaging, 1993
- The application of phase shifts in NMR for flow measurementMagnetic Resonance in Medicine, 1990
- Quantitative Flow Measurement in Phase Contrast MR AngiographyJournal of Computer Assisted Tomography, 1988
- Magnetic resonance velocity mapping: clinical application of a new technique.Heart, 1987
- Magnetic Resonance Imaging the Velocity Vector Components of Fluid FlowMagnetic Resonance in Medicine, 1985
- Measurement of Flow with NMR Imaging Using a Gradient Pulse and Phase Difference TechniqueJournal of Computer Assisted Tomography, 1984
- A flow velocity zeugmatographic interlace for NMR imaging in humansMagnetic Resonance Imaging, 1982