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Related Experiment Videos

Frequency-modulated steady-state free precession imaging.

D L Foxall1

  • 1Philips Medical Systems, Inc., Cleveland, Ohio 44143, USA. david.foxhall@cle.phillips.com

Magnetic Resonance in Medicine
|September 5, 2002
PubMed
Summary
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Steady-state free precession (SSFP) excitation is tolerant of spectral offset frequency variations. This discovery eliminates banding artifacts in fully balanced SSFP magnetic resonance imaging sequences.

Area of Science:

  • Magnetic Resonance Imaging
  • Biomedical Engineering
  • Physics

Background:

  • Steady-state free precession (SSFP) is a widely used pulse sequence in magnetic resonance imaging (MRI).
  • Banding artifacts, characterized by signal voids or bright bands, are a common issue in SSFP imaging, particularly with balanced sequences.
  • These artifacts arise from imperfections in the RF pulse or magnetic field inhomogeneities, leading to off-resonance effects.

Purpose of the Study:

  • To investigate the tolerance of SSFP excitation to variations in spectral offset frequency.
  • To explore the potential of this tolerance for artifact reduction in SSFP imaging.
  • To demonstrate the elimination of banding artifacts in fully balanced SSFP sequences.

Main Methods:

  • Exploration of SSFP excitation properties under varying spectral offset frequencies.

Related Experiment Videos

  • Development and application of a method leveraging spectral offset frequency tolerance.
  • Imaging using a fully balanced SSFP sequence with the developed artifact elimination technique.

    • Main Results:

    • SSFP excitation demonstrates significant tolerance to slow variations in spectral offset frequency.
    • The developed method effectively mitigates banding artifacts in SSFP images.
    • High-quality images free from banding artifacts were obtained using the modified SSFP sequence.

    Conclusions:

    • The tolerance of SSFP to spectral offset frequency variations is a key characteristic that can be exploited.
    • This finding offers a novel approach to eliminate banding artifacts in SSFP MRI.
    • The results pave the way for improved image quality in SSFP-based MRI applications.