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Related Experiment Videos

Normal myocardial perfusion assessed with multishot echo-planar imaging

J Schwitter1, J F Debatin, G K von Schulthess

  • 1Department of Radiology, University Hospital, Zurich, Switzerland.

Magnetic Resonance in Medicine
|January 1, 1997
PubMed
Summary

A novel magnetic resonance imaging technique improves myocardial perfusion assessment. This new electrocardiogram-gated echo-planar imaging strategy allows full heart coverage, offering better insights into blood flow dynamics.

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Area of Science:

  • Cardiovascular Imaging
  • Magnetic Resonance Imaging
  • Physiology

Background:

  • Assessing myocardial perfusion is crucial for diagnosing heart conditions.
  • Traditional T1-weighted fast gradient-echo MRI has limitations in temporal resolution and full heart coverage.
  • Improving imaging strategies is essential for accurate cardiac blood flow evaluation.

Purpose of the Study:

  • To introduce and evaluate a new electrocardiogram-gated multishot echo-planar imaging (EPI) sequence for myocardial perfusion MRI.
  • To overcome the limitations of gradient-echo techniques in cardiac imaging.
  • To quantify myocardial perfusion using the novel EPI sequence.

Main Methods:

  • Utilized an electrocardiogram-gated multishot echo-planar imaging sequence with intrinsic T1 weighting.

Related Experiment Videos

  • Imaged seven volunteers with varying doses of gadolinium diethylenetriamine pentaacetic acid (Gd-DTPA).
  • Quantified first-pass contrast dynamics in 13 regions per heart, covering the entire heart with 5-7 slices every two heartbeats.

    • Main Results:

    • The novel EPI sequence successfully imaged the complete heart in all volunteers.
    • Homogeneous enhancement was observed throughout the left ventricular myocardium.
    • Optimal contrast dose of 0.05 mmol/kg Gd-DTPA yielded approximately 50% enhancement.

    Conclusions:

    • The developed electrocardiogram-gated multishot EPI sequence is effective for myocardial perfusion imaging.
    • This technique provides comprehensive heart coverage and adequate temporal resolution.
    • It represents a significant advancement for assessing cardiac blood flow and diagnosing related conditions.