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Related Experiment Videos

Fast MRI by creating multiple spin echoes in a CPMG sequence

K Oshio1, F A Jolesz

  • 1Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115.

Magnetic Resonance in Medicine
|August 1, 1993
PubMed
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A new imaging technique, Rapid Acquisition with Stimulated Echo Refocusing (RASTER), offers faster multislice imaging than RARE. While maintaining spin echo contrast, RASTER achieves speed by creating multiple spin echoes but has a reduced signal-to-noise ratio.

Area of Science:

  • Medical Imaging
  • Magnetic Resonance Imaging (MRI)

Background:

  • Rapid Acquisition with Relaxation Enhancement (RARE) is a common MRI technique.
  • There is a need for faster multislice imaging protocols in MRI.

Purpose of the Study:

  • To develop a novel, faster multislice MRI technique.
  • To evaluate the performance of the new technique against RARE.

Main Methods:

  • Developed Rapid Acquisition with STimulated Echo Refocusing (RASTER) technique.
  • RASTER utilizes stimulated echoes and differential phase encoding for multiple spin echoes per 180-degree pulse.
  • Compared RASTER speed and image contrast to RARE.

Main Results:

  • RASTER achieves significantly faster acquisition times compared to RARE.

Related Experiment Videos

  • RASTER maintains comparable spin echo image contrast to RARE.
  • The primary limitation identified for RASTER is a reduced signal-to-noise ratio.

    • Conclusions:

    • RASTER is a promising fast multislice MRI technique.
    • The speed advantage of RASTER comes at the cost of signal-to-noise ratio.
    • Further optimization may be needed to address the signal-to-noise ratio limitation.