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Coronary artery imaging at 0.5 T using segmented 3D echo planar imaging

P Börnert1, D Jensen

  • 1Philips Research, Department Technical Systems, Hamburg, Germany.

Magnetic Resonance in Medicine
|December 1, 1995
PubMed
Summary

This study demonstrates 3D gradient echo EPI at 0.5 T for coronary artery imaging. The method achieves high resolution and signal-to-noise ratio, enabling clear visualization of coronary arteries without segmentation.

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Area of Science:

  • Medical Imaging
  • Cardiovascular Technology
  • Magnetic Resonance Imaging

Background:

  • Coronary artery imaging is crucial for diagnosing cardiovascular diseases.
  • Current imaging techniques face challenges in achieving high spatial resolution and signal-to-noise ratio.
  • Advanced magnetic resonance imaging (MRI) methods are needed for improved coronary visualization.

Purpose of the Study:

  • To evaluate the application of segmented 3D gradient echo echo-planar imaging (EPI) at 0.5 Tesla for coronary artery imaging.
  • To assess the feasibility of achieving sufficient signal-to-noise ratio (SNR) and high spatial resolution for coronary visualization.
  • To explore methods for direct visualization of coronary arteries without the need for post-processing segmentation.

Main Methods:

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  • Utilized segmented 3D gradient echo EPI at 0.5 T.
  • Employed fat suppression, electrocardiogram (ECG) triggering, and patient-controlled breath-holding.
  • Acquired data using a phased array cardiac receive coil for enhanced signal detection.
  • Investigated both wide 3D volumes for proximal branches and narrow 3D volumes for selected arteries.

    • Main Results:

    • Achieved sufficient signal-to-noise ratio for thin, contiguous slices.
    • Enabled high spatial resolution imaging of wide 3D volumes covering proximal coronary branches.
    • Demonstrated direct visualization of selected coronary arteries over several centimeters in narrow 3D volumes.
    • Showcased the potential for subsequent vessel segmentation from wide volume data.

    Conclusions:

    • Segmented 3D gradient echo EPI at 0.5 T is a viable technique for coronary artery imaging.
    • The method provides high-quality data suitable for both segmentation and direct visualization.
    • This approach offers improved visualization of coronary arteries, potentially aiding in diagnosis and treatment planning.