Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Background gradient suppression in stimulated echo NMR diffusion studies using magic pulsed field gradient ratios.

Petrik Galvosas1, Frank Stallmach, Jörg Kärger

  • 1Institut für Experimentelle Physik I, Fakultät für Physik und Geowissenschaften, Universität Leipzig Linnestrasse 5, 04105 Leipzig, Germany.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|January 20, 2004
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Diffusion and Adsorption of 2‑Methylpentane and 3‑Methylpentane in MFI-Type Zeolite Crystals.

The journal of physical chemistry. C, Nanomaterials and interfaces·2026
Same author

Data inversion of multi-dimensional magnetic resonance in porous media.

Magnetic resonance letters·2025
Same author

Diffusion anomaly in nanopores as a rich field for theorists and a challenge for experimentalists.

Nature communications·2024
Same author

Precise control over gas-transporting channels in zeolitic imidazolate framework glasses.

Nature materials·2023
Same author

Single-Sided Magnet System for Quantitative MR Relaxometry and Preclinical In-Vivo Monitoring.

IEEE transactions on bio-medical engineering·2023
Same author

Study of zeolite anti-caking effects for fertilisers by <sup>1</sup>H low-field NMR.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2022
Same journal

Localization-driven exchange contrast in diffusion exchange spectroscopy.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

4.5 Tesla superconducting miniature magnet in liquid nitrogen.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

Folding and unfolding dynamics of a DNA aptamer studied by heteronuclear <sup>1</sup>H-<sup>13</sup>C correlation zz-exchange spectroscopy.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

Multi-spin control from one-spin pulses.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

Altering MRI rotating frame relaxations by changing the truncation level of Hyperbolic Secant pulse.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

Effects of proton exchange on the lifetimes of long-lived states in aliphatic chains.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
See all related articles

This study introduces magic pulsed field gradient (MPFG) ratios to suppress background gradients in pulsed field gradient NMR diffusion studies. These ratios enable accurate measurements in heterogeneous systems by minimizing interference from unknown internal gradients.

Area of Science:

  • Magnetic Resonance Imaging
  • Physical Chemistry
  • Materials Science

Background:

  • Background field gradients in pulsed field gradient (PFG) NMR can distort diffusion measurements.
  • Heterogeneous systems often exhibit unknown and time-varying internal background gradients.
  • Accurate diffusion measurements are crucial for understanding material properties.

Purpose of the Study:

  • To derive and validate magic pulsed field gradient (MPFG) ratios for suppressing cross terms between background and pulsed field gradients.
  • To enable robust NMR diffusion studies in systems with unknown or time-dependent background gradients.
  • To provide a convenient experimental method for background gradient suppression.

Main Methods:

  • Evaluation of spin echo attenuation in a generalized 13-interval PFG NMR sequence.

Related Experiment Videos

  • Derivation of MPFG ratios (G(p)/F(p) and G(r)/F(r)) based on pulse sequence timing.
  • Experimental validation using time-dependent external and spatially dependent internal gradients.

    • Main Results:

    • MPFG ratios are derived, dependent only on pulse sequence timing (delta and tau).
    • These ratios effectively suppress unwanted cross terms, even with changing background gradients.
    • Experimental results confirm theoretical predictions, demonstrating significant suppression of interference.

    Conclusions:

    • MPFG ratios offer a convenient and effective method for background gradient suppression in NMR diffusion studies.
    • The approach is applicable to heterogeneous systems with unknown internal gradients.
    • This work extends previous methods for PFG NMR background correction.