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Related Experiment Videos

Gradient amplifier imperfections in NMR imaging.

J Weis1, L Budinský, M Krízik

  • 1Institute of Measurement Science, Slovak Academy of Sciences, Bratislava, Czechoslovakia.

Magnetic Resonance Imaging
|January 1, 1992
PubMed
Summary
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Gradient amplifier transition distortion causes artifacts in direct Fourier Nuclear Magnetic Resonance (NMR) imaging. This study compares real measurement artifacts with computer simulations, revealing image distortions in spin density measurements.

Area of Science:

  • Magnetic Resonance Imaging
  • Signal Processing

Background:

  • Direct Fourier Nuclear Magnetic Resonance (NMR) imaging is a powerful technique.
  • Gradient amplifiers are crucial components in NMR imaging systems.
  • Transition distortion in gradient amplifiers can introduce errors.

Purpose of the Study:

  • To investigate the impact of gradient amplifier transition distortion on direct Fourier NMR imaging.
  • To identify and characterize image artifacts caused by this distortion.
  • To compare experimental findings with simulated results.

Main Methods:

  • Utilized direct Fourier NMR imaging techniques.
  • Introduced controlled transition distortion in gradient amplifiers.
  • Acquired spin density images from real measurements.

Related Experiment Videos

  • Performed computer simulations to model transition distortion effects.

    • Main Results:

    • Observed specific artifacts in spin density images due to gradient amplifier transition distortion.
    • Quantified the discrepancies between real measurements and simulations.
    • Demonstrated a correlation between simulated and measured image artifacts.

    Conclusions:

    • Transition distortion in gradient amplifiers significantly influences direct Fourier NMR imaging.
    • The study validates simulation models for predicting these artifacts.
    • Understanding and mitigating these distortions are essential for accurate NMR imaging.