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Related Experiment Videos

Fat-suppressed steady-state free precession imaging using phase detection.

Brian A Hargreaves1, Shreyas S Vasanawala, Krishna S Nayak

  • 1Department of Electrical Engineering, Stanford University, Stanford, California 94305-9510, USA. brian@mrsrl.stanford.edu

Magnetic Resonance in Medicine
|June 20, 2003
PubMed
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Fully refocused steady-state free precession (SSFP) imaging uses a 180-degree phase difference between lipid and water signals. This enables rapid fat-water separation for clear, non-contrast angiograms without increasing scan time.

Area of Science:

  • Medical Imaging
  • Magnetic Resonance Imaging (MRI)

Background:

  • Steady-state free precession (SSFP) is an efficient MRI sequence.
  • SSFP offers diagnostically useful image contrast.
  • Signal refocusing occurs between excitation pulses in SSFP.

Purpose of the Study:

  • To leverage SSFP for fat-water separation.
  • To achieve fat-water separation without extending scan duration.
  • To evaluate SSFP for peripheral vascular imaging.

Main Methods:

  • Utilized the alternating phase of refocused spins in SSFP.
  • Selected repetition time (TR) to create a 180-degree phase shift between lipid and water.
  • Applied SSFP for non-contrast-enhanced angiography.

Related Experiment Videos

Main Results:

  • Demonstrated effective fat-water separation using SSFP.
  • Achieved separation without any increase in imaging time.
  • Produced excellent, flow-independent angiograms of peripheral vasculature.

Conclusions:

  • SSFP is a valuable technique for rapid fat-water separation.
  • This method enhances peripheral vascular imaging.
  • SSFP provides high-quality, non-contrast angiograms efficiently.