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Multishot diffusion-weighted FSE using PROPELLER MRI

James G Pipe1, Victoria G Farthing, Kirsten P Forbes

  • 1MRI Department, Barrow Neurological Institute, Phoenix, Arizona 85013, USA.

Magnetic Resonance in Medicine
|January 5, 2002
PubMed

Insights

This study introduces a novel self-navigated fast spin-echo method for artifact-free diffusion-weighted imaging. It enhances image quality by minimizing common echo-planar imaging artifacts and motion issues.

Area of Science:

  • Magnetic Resonance Imaging
  • Medical Imaging Physics

Background:

  • Echo-planar imaging (EPI) is prone to artifacts like signal pile-up and geometric distortion.
  • These artifacts limit the diagnostic quality of diffusion-weighted images (DWIs).

Purpose of the Study:

  • To develop a diffusion-weighted imaging method free from EPI-associated artifacts.
  • To improve robustness against motion artifacts for clearer imaging.

Main Methods:

  • Utilized an ungated, multishot fast spin-echo (FSE) acquisition.
  • Employed self-navigation techniques for motion correction.
  • Alternated refocusing pulse phases to minimize non-Carr-Purcell-Meiboom-Gill (CPMG) artifacts.
  • Integrated multiple reconstruction methods for enhanced motion robustness.

Main Results:

  • Successfully obtained diffusion-weighted images without common EPI artifacts.
  • Demonstrated high-resolution diffusion tensor imaging (DTI) capabilities.
  • Showcased clinical applicability of the developed method.

Conclusions:

  • The proposed self-navigated multishot FSE method offers artifact-free diffusion-weighted imaging.
  • This technique improves image quality and motion robustness in MRI.
  • It holds promise for advanced clinical DWI and DTI applications.

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