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Related Experiment Videos

Phasing arbitrarily sampled multidimensional NMR data.

John M Gledhill1, A Joshua Wand

  • 1Johnson Research Foundation and Department of Biochemistry & Biophysics, University of Pennsylvania, 905 Stellar-Chance Laboratories, 422 Curie Blvd., Philadelphia, PA 19104-6059, USA.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|June 23, 2007
PubMed
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This study introduces two novel methods for retrospective phase correction, addressing artifacts in radially sampled data crucial for two-dimensional Fourier transformation (2D-FT) analysis. These techniques improve the accuracy of transforming complex time-domain signals.

Area of Science:

  • Signal Processing
  • Spectroscopy
  • Data Analysis

Background:

  • Two-dimensional Fourier transformation (2D-FT) enables signal transformation from arbitrarily sampled time-domain data.
  • Radial sampling offers advantages in 2D-FT by minimizing leakage artifacts.
  • Radially sampled data inherently produces frequency-domain artifacts (ridges) that complicate analysis.

Purpose of the Study:

  • To present two novel procedures for retrospective phase correction of arbitrarily sampled data.
  • To address the challenge of ridge artifacts in radially sampled time-domain signals.
  • To enable accurate frequency-domain analysis of data acquired with radial sampling.

Main Methods:

  • Development of two distinct algorithms for retrospective phase correction.

Related Experiment Videos

  • Application of these methods to arbitrarily sampled time-domain data.
  • Evaluation of artifact removal effectiveness in the frequency domain.

    • Main Results:

    • Successful implementation of two retrospective phase correction procedures.
    • Demonstrated reduction or elimination of ridge artifacts in the frequency domain.
    • Improved accuracy in the analysis of radially sampled data.

    Conclusions:

    • The presented methods effectively correct phase artifacts in arbitrarily sampled data.
    • These techniques overcome limitations of existing algorithms requiring specific line shapes.
    • The developed procedures enhance the utility of radial sampling in 2D-FT applications.