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Phased array ghost elimination (PAGE) for segmented SSFP imaging with interrupted steady-state.

Peter Kellman1, Michael A Guttman, Daniel A Herzka

  • 1Laboratory of Cardiac Energetics, National Institutes of Health, National Heart, Lung and Blood Institute, Bethesda, Maryland 20892-1061, USA. kellman@nih.gov

Magnetic Resonance in Medicine
|December 5, 2002
PubMed
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Phased-array ghost elimination (PAGE) effectively removes artifacts in cardiac steady-state free precession (SSFP) imaging. This method addresses ghosting in interrupted steady-state sequences without requiring extra imaging time.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Cardiovascular Imaging
  • Medical Physics

Background:

  • Steady-state free precession (SSFP) offers high signal-to-noise ratio and blood-myocardium contrast, making it valuable for cardiac imaging.
  • ECG-triggered, segmented SSFP sequences can suffer from ghost artifacts due to periodic k-space distortion, particularly during the approach to or return to steady-state.
  • Existing methods to restore steady-state often involve preparatory radiofrequency (RF) pulses that increase imaging time during early systole.

Purpose of the Study:

  • To evaluate the phased-array ghost elimination (PAGE) method for removing ghost artifacts in cardiac cine SSFP imaging.
  • To assess the efficacy of PAGE in interrupted steady-state SSFP sequences.
  • To demonstrate PAGE as an alternative to time-consuming preparatory RF pulse schemes.

Related Experiment Videos

Main Methods:

  • Demonstration of the phased-array ghost elimination (PAGE) method.
  • Application of PAGE to cardiac cine SSFP imaging with interrupted steady-state.
  • Utilized a simple alpha/2 magnetization preparation and storage scheme alongside spatial tagging preparation.

Main Results:

  • The PAGE method was successfully demonstrated for ghost artifact removal.
  • Artifacts were effectively removed from the initial frames of interrupted steady-state cardiac cine SSFP imaging.
  • PAGE provides a viable alternative to preparatory RF pulses, avoiding additional imaging time.

Conclusions:

  • Phased-array ghost elimination (PAGE) is an effective technique for mitigating ghost artifacts in cardiac SSFP imaging.
  • PAGE offers a time-efficient solution for interrupted steady-state SSFP sequences, preserving early systolic imaging time.
  • This method enhances the quality and diagnostic utility of cardiac SSFP MRI.