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Related Experiment Videos

Visualization of aortic valve leaflets using black blood MRI.

A E Arai1, F H Epstein, K E Bove

  • 1Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892-1061, USA.

Journal of Magnetic Resonance Imaging : JMRI
|November 5, 1999
PubMed
Summary

Magnetic resonance imaging (MRI) can now visualize aortic valve leaflets in most patients, aiding in the detection of conditions like bicuspid aortic valves. This advancement improves diagnosis for valvular heart disease.

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Area of Science:

  • Cardiovascular Imaging
  • Medical Physics

Background:

  • Direct visualization of heart valve leaflets using MRI has been challenging.
  • Cardiac MRI is typically used for myocardial volume and mass assessment.

Purpose of the Study:

  • To evaluate the feasibility of visualizing aortic valve leaflets using a specific MRI technique.
  • To assess the diagnostic potential of MRI for aortic valve abnormalities.

Main Methods:

  • 120 patients undergoing cardiac MRI were studied.
  • A 1.5 T scanner with enhanced gradients and a cardiac phased-array coil was used.
  • A double inversion recovery fast spin-echo sequence acquired short-axis images during breath-hold.

Main Results:

  • Aortic valve leaflets were visualized in 85% of studies (102/120).

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  • Seven cases of abnormal aortic valves (bicuspid or thickened) were identified.
  • Signal-to-noise ratio of leaflets was significantly higher than surrounding blood (14±5 vs 7±4).

    • Conclusions:

    • MRI can successfully visualize aortic valve leaflets in a high proportion of patients.
    • This technique shows promise for diagnosing valvular heart disease and warrants further investigation.