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Human cardiac imaging at 3 T using phased array coils.

R Noeske1, F Seifert, K H Rhein

  • 1Physikalisch-Technische Bundesanstalt, Berlin, Germany. ralph.noeske@ptb.de

Magnetic Resonance in Medicine
|December 7, 2000
PubMed
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High-quality cardiac MRI at 3 Tesla is achievable, but susceptibility effects may complicate advanced imaging techniques like real-time, spiral, and echo planar imaging due to shorter T*(2) and increased B(0) inhomogeneity.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Cardiovascular Imaging
  • Biophysics

Background:

  • Cardiac MRI at 3 Tesla (3T) offers potential for improved signal-to-noise ratio (SNR).
  • Susceptibility effects at higher field strengths can pose challenges for MRI quality.

Purpose of the Study:

  • To evaluate the feasibility of high-quality cardiac MRI at 3T.
  • To assess T*(2) and B(0) inhomogeneity within the myocardium at 3T.
  • To identify potential challenges for advanced MRI techniques at 3T.

Main Methods:

  • Utilized a two-element phased array receiver coil.
  • Acquired single breath-hold, electrocardiogram (ECG) gated cardiac images.
  • Measured T*(2) and B(0) inhomogeneity at multiple myocardial locations.

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Main Results:

  • Achieved high signal-to-noise ratios (up to 130) and contrast-to-noise ratios (exceeding 35) between myocardium and blood.
  • Determined shorter T*(2) times and larger B(0) inhomogeneities in the myocardium.
  • Observed increased susceptibility effects at 3T.

Conclusions:

  • High-quality cardiac MRI is feasible at 3T, demonstrating excellent image quality.
  • Shorter T*(2) and increased B(0) inhomogeneity at 3T may impede real-time, spiral, and echo planar imaging.
  • Further research is needed to optimize advanced imaging sequences for 3T cardiac MRI.