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B0 insensitive multiple-quantum resolved sodium imaging using a phase-rotation scheme.

Daniel P Fiege1, Sandro Romanzetti, Desmond H Y Tse

  • 1Institute of Neuroscience and Medicine-4, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|January 23, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a novel phase-rotation method for triple-quantum filtering in MRI. It overcomes signal dropouts caused by field inhomogeneities, improving image quality and maintaining signal-to-noise efficiency.

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Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Quantum Coherence Spectroscopy

Background:

  • Triple-quantum filtering (TQF) differentiates physiological compartments in MRI.
  • TQF is susceptible to static field inhomogeneities, causing signal dropouts due to destructive interference of coherence pathways.

Purpose of the Study:

  • To develop a novel phase-rotation scheme for simultaneous acquisition and separation of coherence pathways in TQF-MRI.
  • To circumvent signal dropouts while maintaining signal-to-noise efficiency.

Main Methods:

  • A phase-rotation scheme was implemented to acquire all coherence pathways simultaneously.
  • Separation of pathways was achieved using Fourier transform.
  • The method requires a minimum of 36 cycling steps.

Main Results:

  • The phase-rotation method successfully yields single-, double-, and triple-quantum filtered images.
  • Destructive interference was circumvented, eliminating signal dropouts.
  • Full signal-to-noise efficiency was maintained for all coherences.

Conclusions:

  • The proposed phase-rotation scheme offers an improved approach to TQF-MRI.
  • This method enhances image quality by overcoming field inhomogeneity limitations.
  • It provides efficient acquisition of multi-quantum filtered images.