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Related Experiment Videos

Analysis of multiple-acquisition SSFP.

Neal K Bangerter1, Brian A Hargreaves, Shreyas S Vasanawala

  • 1Department of Electrical Engineering, Stanford University, Stanford, California, USA. nealb@mrsrl.stanford.edu

Magnetic Resonance in Medicine
|May 4, 2004
PubMed
Summary
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This study introduces sum-of-squares steady-state free precession (SSFP) imaging to reduce banding artifacts. The new method offers improved signal-to-noise ratio efficiency compared to existing techniques.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Physics
  • Biomedical Engineering

Background:

  • Refocused steady-state free precession (SSFP) MRI is prone to banding artifacts due to field variations, especially at high fields or long repetition times (TRs).
  • Existing methods like maximum-intensity SSFP (MI-SSFP) and complex-sum SSFP (CS-SSFP) reduce banding but decrease signal-to-noise ratio (SNR) efficiency.

Purpose of the Study:

  • To develop a general framework for analyzing banding artifact reduction, contrast, and SNR in multiple-acquisition SSFP methods.
  • To introduce and evaluate a novel sum-of-squares SSFP (SOS-SSFP) technique.

Main Methods:

  • A general framework was established to analyze SSFP combination techniques.
  • A new sum-of-squares (SOS-SSFP) method was proposed and compared against existing techniques (MI-SSFP, CS-SSFP).

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Main Results:

  • The proposed SOS-SSFP technique demonstrates robust reduction of banding artifacts.
  • SOS-SSFP achieves higher SNR efficiency compared to other multiple-acquisition SSFP methods.
  • SSFP contrast is effectively preserved with the SOS-SSFP method.

Conclusions:

  • The sum-of-squares SSFP (SOS-SSFP) technique provides superior banding artifact reduction and SNR efficiency.
  • SOS-SSFP is a promising advancement for SSFP imaging, maintaining essential contrast properties.