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Related Experiment Videos

Radial GRASE: implementation and applications.

Arthur F Gmitro1, Mitsuko Kono, Rebecca J Theilmann

  • 1Department of Radiology, University of Arizona, Tucson, Arizona 85724-5067, USA. gmitro@radiology.arizona.edu

Magnetic Resonance in Medicine
|May 21, 2005
PubMed
Summary
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Radial GRAdient Spin Echo (RAD-GRASE) MRI offers reduced motion sensitivity for high-resolution diffusion-weighted imaging. This technique enables diverse image contrasts and parametric mapping from a single scan.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Imaging Physics

Background:

  • Radial k-space scanning offers advantages in motion artifact reduction and correction.
  • Gradient and Spin Echo (GRASE) techniques are established MRI methods.

Purpose of the Study:

  • To introduce and detail the capabilities of the RAD-GRASE MRI sequence.
  • To highlight RAD-GRASE's potential for high-resolution diffusion-weighted imaging (DWI) and multi-contrast imaging.

Main Methods:

  • Combines radial data acquisition with GRASE technique.
  • Utilizes oversampling of low spatial frequencies for partial data reconstruction.
  • Employs controlled magnetization preparation and sequence timing.

Main Results:

  • Achieves high-resolution DWI with reduced motion sensitivity.

Related Experiment Videos

  • Enables generation of multiple image contrasts (DWI, T(1), T(2), T(2)*) from a single dataset.
  • Facilitates parametric mapping of equilibrium magnetization, T(2), and T(2) (dagger).
  • Allows for fat-suppressed and/or separated fat/water imaging.

    • Conclusions:

    • RAD-GRASE is a versatile MRI technique with significant advantages for motion-robust imaging.
    • The sequence allows for efficient generation of diverse image contrasts and parametric maps.
    • RAD-GRASE holds promise for advanced quantitative MRI applications.