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Related Experiment Videos

Magnetic resonance imaging-guided coronary interventions.

Nikolaos V Tsekos1, Ergin Atalar, Debiao Li

  • 1Cardiovascular Imaging Laboratory, Mallinckrodt Institute of Radiology, Washington University, St. Louis, Missouri 63110, USA. tsekosn@mir.wustl.edu

Journal of Magnetic Resonance Imaging : JMRI
|June 2, 2004
PubMed
Summary

Magnetic resonance imaging (MRI) offers a safer, more comprehensive approach to guiding coronary interventions. This non-ionizing radiation technique provides detailed 3D views and functional assessments, demonstrating feasibility for future clinical use.

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Area of Science:

  • Cardiovascular Imaging
  • Interventional Cardiology
  • Medical Physics

Background:

  • Conventional x-ray angiography for coronary interventions poses risks associated with ionizing radiation.
  • Magnetic resonance imaging (MRI) presents potential advantages, including nonionizing radiation, simultaneous anatomical and functional assessment, and 3D visualization of coronary arteries.

Purpose of the Study:

  • To explore the feasibility and potential advantages of MRI-guided coronary interventions.
  • To evaluate novel MRI techniques for real-time coronary angiography and catheter tracking.

Main Methods:

  • Real-time coronary MR angiography utilizing low-dose intraarterial contrast media infusion.
  • Development and application of actively visible guidewires and guiding catheters for navigating tortuous coronary vessels.

Related Experiment Videos

  • Utilizing passive tracking approaches for imaging contrast-filled catheters and placing endovascular stents.

    • Main Results:

    • Achieved high in-plane spatial resolution (0.8 x 0.8 mm2) and temporal resolution (130 msec) in real-time coronary MR angiography.
    • Demonstrated successful catheter navigation and placement of angioplasty balloon catheters using actively visible MRI tools.
    • Showcased the utility of MRI for assessing regional myocardial perfusion and placing susceptibility-based stents.

    Conclusions:

    • Early results indicate the feasibility of performing MRI-guided coronary interventions.
    • While further development is needed for clinical application, MRI shows promise as a future tool for diagnosing and treating coronary artery disease.