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View-ordering in radial fast spin-echo imaging.

Rebecca J Theilmann1, Arthur F Gmitro, Maria I Altbach

  • 1Department of Radiology, University of Arizona, Tucson, Arizona 85724-5084, USA.

Magnetic Resonance in Medicine
|April 6, 2004
PubMed
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Optimizing radial MRI view ordering minimizes streaking artifacts caused by T2 decay in fast spin-echo sequences. This technique improves image quality by controlling data acquisition timing and order.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Imaging Physics
  • Image Reconstruction

Background:

  • Radial MRI sequences offer reduced motion sensitivity, crucial for dynamic imaging.
  • Fast spin-echo (FSE) sequences accelerate MRI acquisition but can introduce artifacts.
  • In radial FSE, varying echo times (TE) across acquired data lines cause T2 decay-related streaking artifacts.

Purpose of the Study:

  • To investigate the impact of view ordering on streaking artifacts in radial FSE MRI.
  • To develop and evaluate novel view-ordering strategies for artifact reduction.
  • To optimize radial FSE sequences for improved image quality and reduced T2 decay effects.

Main Methods:

  • Implementation of four distinct view-ordering techniques for radial FSE acquisition.

Related Experiment Videos

  • Systematic evaluation of artifact levels based on T2 decay and acquisition timing.
  • Analysis of the relationship between view order and resulting image streaking.

    • Main Results:

    • View ordering significantly influences the severity of streaking artifacts in radial FSE images.
    • Specific view-ordering strategies effectively minimize artifacts related to T2 decay.
    • Optimized ordering reduces artifacts without compromising motion sensitivity.

    Conclusions:

    • Radial MRI view ordering is a critical parameter for controlling T2 decay artifacts in FSE sequences.
    • Strategic view ordering can enhance image quality in motion-sensitive radial MRI applications.
    • This work provides practical methods for artifact mitigation in radial FSE imaging.