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Related Experiment Videos

Coronary artery wall imaging: initial experience at 3 Tesla.

Ioannis Koktzoglou1, Orlando Simonetti, Debiao Li

  • 1Departments of Radiology and Biomedical Engineering, Northwestern University, Chicago, Illinois, USA.

Journal of Magnetic Resonance Imaging : JMRI
|January 25, 2005
PubMed
Summary

Black-blood turbo spin-echo imaging of the left anterior descending coronary artery wall is feasible at 3 Tesla, using either free-breathing or breath-hold techniques. Further improvements are needed for coronary plaque characterization.

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Area of Science:

  • Cardiovascular Magnetic Resonance Imaging
  • High-Field MRI Technology

Background:

  • Assessing coronary artery disease requires detailed imaging of the vessel wall.
  • Previous magnetic resonance (MR) imaging at 1.5 Tesla has provided coronary wall data.
  • Advancements in MRI technology, particularly at 3 Tesla, offer potential for improved resolution and signal-to-noise ratios.

Purpose of the Study:

  • To evaluate the feasibility of black-blood turbo spin-echo (TSE) imaging for the left anterior descending (LAD) coronary artery wall.
  • To compare free-breathing and breath-hold imaging conditions at 3 Tesla.
  • To assess the diagnostic potential of 3T MRI for coronary artery wall assessment.

Main Methods:

  • Proton density-weighted black-blood TSE imaging of the LAD coronary artery was performed in 15 healthy volunteers.

Related Experiment Videos

  • Imaging was conducted on a 3 Tesla (T) whole-body scanner using an eight-channel phased array coil.
  • Volunteers underwent free-breathing (with navigators) and/or breath-hold imaging sequences. Image analysis included wall thickness, wall area, lumen diameter, and lumen area measurements, alongside signal-to-noise and contrast-to-noise ratio calculations.

    • Main Results:

    • Coronary artery wall thickness, wall area, lumen diameter, and lumen area measurements obtained at 3 Tesla were comparable to previously reported findings at 1.5 Tesla.
    • Image acquisition was successful in the majority of volunteers, though some experienced technical limitations related to gradient or radiofrequency (RF) coupling with electrocardiogram (ECG).

    Conclusions:

    • Two-dimensional black-blood TSE imaging of the coronary artery wall is feasible at 3 Tesla under both free-breathing and breath-hold conditions.
    • Current imaging parameters and resolution require further optimization for the detection and detailed characterization of coronary plaque.
    • 3T MRI shows promise for non-invasive coronary artery wall imaging, warranting further technical development.