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Cardiopulmonary vascular imaging.
K M Link1, S P Loehr, N M Lesko
1Bowman Gray School of Medicine, Department of Radiology, Winston-Salem, NC 27157.
Investigative Radiology
|December 1, 1992
Summary
Magnetic resonance angiography (MRA) improves visualization of blood vessels using MRI. Cardiopulmonary MRA faces challenges like motion, but techniques like spin-echo and gradient-echo show promise for better imaging.
Area of Science:
- Medical Imaging
- Cardiovascular Science
- Radiology
Background:
- Magnetic resonance angiography (MRA) is effective for visualizing vasculature.
- Cardiopulmonary MRA presents unique challenges including cardiorespiratory motion and pulsatile flow.
- Existing MRA techniques require optimization for the cardiopulmonary system.
Purpose of the Study:
- To evaluate the effectiveness of different MRA techniques for cardiopulmonary imaging.
- To identify methods for overcoming challenges in cardiopulmonary MRA.
- To assess the suitability of spin-echo, gradient-echo, and phase mapping for pulmonary vasculature.
Main Methods:
- Utilized multislice spin-echo (SE) and gradient-echo (GRE) techniques.
- Employed ECG-gating or referencing to compensate for cardiac motion.
- Investigated phase velocity mapping for blood flow quantification.
Main Results:
- SE and GRE techniques demonstrated effectiveness in cardiopulmonary MRA.
- ECG-gating and referencing helped manage cardiac motion artifacts.
- Phase velocity mapping showed promise for evaluating the cardiopulmonary vascular system.
Conclusions:
- Spin-echo, gradient-echo, and phase mapping techniques are well-suited for cardiopulmonary MRA.
- Addressing motion and flow dynamics is crucial for high-quality cardiopulmonary MRA.
- Further development may require near-instantaneous scan times for optimal results.