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Related Experiment Videos

Coil-by-coil image reconstruction with SMASH.

C A McKenzie1, M A Ohliger, E N Yeh

  • 1Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02215, USA. charles_mckenzie@caregroup.harvard.edu

Magnetic Resonance in Medicine
|September 11, 2001
PubMed
Summary

This study presents a modified Simultaneous Acquisition of Spatial Harmonics (SMASH) technique. This advancement enables artifact-free magnetic resonance imaging reconstructions by addressing phase cancellation issues in accelerated imaging.

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Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Imaging Physics
  • Signal Processing

Background:

  • Simultaneous Acquisition of Spatial Harmonics (SMASH) is an MRI technique for faster imaging.
  • Existing SMASH methods can produce phase cancellation artifacts due to unaligned coil sensitivities.
  • Artifacts in conventional MRI are manageable with methods like sum of squares.

Purpose of the Study:

  • To modify the SMASH technique to eliminate phase cancellation artifacts.
  • To enable the application of standard coil combination methods to SMASH reconstructions.
  • To improve the quality of accelerated MRI scans.

Main Methods:

  • A modified SMASH reconstruction approach was developed.
  • Component coil sensitivity functions were fitted to tailored spatial harmonics.

Related Experiment Videos

  • Standard coil combination techniques were applied to reconstructed individual coil images.

    • Main Results:

    • The modified SMASH technique successfully reconstructed accelerated individual component coil images.
    • Phase cancellation artifacts were eliminated in the final composite images.
    • The method allows for the use of established coil combination strategies.

    Conclusions:

    • The modified SMASH technique provides artifact-free accelerated MRI.
    • This advancement enhances the robustness and applicability of SMASH.
    • The improved method facilitates higher quality accelerated imaging acquisition.