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Related Experiment Videos

Centric phase-encoding order in three-dimensional MP-RAGE sequences: application to abdominal imaging.

A E Bampton1, S J Riederer, H W Korin

  • 1Radiology Service, McGuire Veterans Affairs Medical Center, Richmond, VA 23249.

Journal of Magnetic Resonance Imaging : JMRI
|May 1, 1992
PubMed
Summary
This summary is machine-generated.

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Three-dimensional (3D) centric phase-encoding MRI improves abdominal imaging quality but is generally inferior to 2D methods due to motion artifacts from breath-holds.

Area of Science:

  • Medical Imaging
  • Radiology
  • Magnetic Resonance Imaging (MRI)

Background:

  • Three-dimensional (3D) magnetization-prepared rapid gradient-echo imaging aims to enhance signal-to-noise ratio (S/N) and contrast-to-noise ratio (C/N) in abdominal imaging.
  • A standard sequential phase-encoding order was initially proposed for this technique.

Purpose of the Study:

  • To evaluate two novel 3D centric phase-encoding orders for rapid abdominal MRI.
  • To compare these 3D centric methods against standard 3D sequential and 2D magnetization-prepared techniques.

Main Methods:

  • Developed and tested two 3D centric phase-encoding approaches: 2D centric applied to a 3D direction and an interleaved square spiral (3D analog of 2D centric).
  • Evaluated methods using simulations, phantom studies, and volunteer imaging.

Related Experiment Videos

  • Compared S/N, C/N, and artifact levels across all tested techniques.

    • Main Results:

    • The second 3D centric approach (interleaved square spiral) demonstrated superiority over the first 3D centric method.
    • However, all 3D techniques showed inferior performance compared to 2D magnetization-prepared methods for abdominal imaging.
    • Significant motion artifacts were observed in 3D images due to misregistration from multiple breath-holds.

    Conclusions:

    • While 3D centric phase-encoding shows promise, it is generally less effective than 2D techniques for abdominal MRI.
    • Motion artifacts remain a critical limitation for 3D rapid abdominal imaging requiring multiple breath-holds.