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[Magnetic resonance angiography using a magnetic resonance flow tagging technique]
T Matsuda1, T Sakurai, K Shimizu
1Department of Internal Medicine, Faculty of Medicine, Kyoto University.
Journal of Cardiology
|January 1, 1990
Summary
This study introduces a direct bolus imaging method for magnetic resonance angiography, enabling non-invasive visualization and flow quantitation of cervical arteries. The technique accurately depicts vascular structures and dynamic flow changes, showing promise for diagnosing lesions.
Area of Science:
- Medical Imaging
- Cardiovascular Imaging
- Flow Dynamics
Context:
- Cervical region angiography requires precise visualization of blood flow.
- Existing methods may lack combined flow quantitation and non-invasive angiography capabilities.
- Direct bolus imaging offers a novel approach for evaluating cervical vasculature.
Purpose:
- To apply and evaluate a direct bolus imaging method for magnetic resonance angiography (MRA) of the cervical region.
- To assess the method's ability to visualize vascular structures and quantify blood flow.
- To determine the technique's potential as a diagnostic tool for stenotic lesions.
Summary:
- A direct bolus imaging technique was utilized for MRA in four volunteers, exciting a 10 mm transverse section to tag blood flow.
- Images were acquired across 4-16 cardiac phases with echo times (TE) from 50-200 msec, visualizing tagged blood flow dynamics.
- Arrow-head shapes formed by slow-moving blood near vessel walls aided in visualizing the common carotid and vertebral arteries, with optimal visualization at TE < 100 msec.
Impact:
- The cine display effectively captured dynamic pulsatile flow changes.
- This method integrates flow quantitation with non-invasive angiography, offering a potentially valuable diagnostic tool.
- Phantom studies confirmed its accuracy in delineating stenotic lesions, a crucial capability for clinical angiography.