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Related Experiment Videos

Improvements in spiral MR imaging.

P Börnert1, H Schomberg, B Aldefeld

  • 1Philips Research Laboratories, Technical Systems Department, Hamburg, Germany. p.boernert@pfh.research.philips.com

Magma (New York, N.Y.)
|November 11, 1999
PubMed
Summary
This summary is machine-generated.

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High-quality spiral magnetic resonance imaging (MRI) is achievable by correcting for off-resonance effects and gradient imperfections. This method yields image quality comparable to conventional spin warp sequences.

Area of Science:

  • Medical Imaging
  • Magnetic Resonance Imaging Physics

Background:

  • Spiral magnetic resonance imaging (MRI) acquisition offers potential advantages but is sensitive to various physical imperfections.
  • Understanding and correcting for these imperfections is crucial for achieving high-quality spiral MRI.

Purpose of the Study:

  • To summarize the principles of spiral MR image acquisition and reconstruction.
  • To detail methods for correcting spiral imaging artifacts caused by off-resonance effects, gradient imperfections, and concomitant fields.
  • To demonstrate the effectiveness of these correction methods using phantom and in-vivo data.

Main Methods:

  • Detailed explanation of spiral MR imaging principles.
  • Identification and characterization of artifact sources: off-resonance effects, gradient imperfections, concomitant fields.

Related Experiment Videos

  • Development and application of correction strategies for these artifacts.
  • Validation using phantom experiments and in-vivo imaging.

    • Main Results:

    • Correction approaches effectively address sensitivity to off-resonance effects and gradient imperfections.
    • Phantom experiments validate the proposed correction methods.
    • In-vivo results confirm the applicability and efficacy of corrections under physiological conditions.
    • Achieved spiral image quality is comparable to robust spin warp sequences.

    Conclusions:

    • Spiral MRI can produce high-quality images when appropriate correction techniques are applied.
    • The discussed corrections mitigate common artifacts, enhancing diagnostic utility.
    • This work supports the clinical applicability of spiral MRI with corrected image quality.