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Atomic Nuclei: Types of Nuclear Relaxation01:28

Atomic Nuclei: Types of Nuclear Relaxation

Nuclear relaxation restores the equilibrium population imbalance and can occur via spin–lattice or spin–spin mechanisms, which are first-order exponential decay processes.
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers energy to a nearby...
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Homonuclear correlation spectroscopy (COSY) is a powerful technique used in Nuclear Magnetic Resonance (NMR) spectroscopy to study the correlations between nuclei of the same type within a molecule. It provides information about scalar couplings between adjacent nuclei, which helps determine connectivity and structural information. There are several COSY variants, each with its unique strengths and experimental parameters.
COSY90 is the standard two-dimensional (2D) COSY experiment that...

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Related Experiment Video

Updated: Jun 13, 2026

NMR 15N Relaxation Experiments for the Investigation of Picosecond to Nanoseconds Structural Dynamics of Proteins
09:25

NMR 15N Relaxation Experiments for the Investigation of Picosecond to Nanoseconds Structural Dynamics of Proteins

Published on: November 1, 2024

Multisliced ultrafast 2D relaxometry.

Luca Venturi1, Joshua Warner, Brian Hills

  • 1Institute of Food Research, Norwich Research Park, Colney, Norwich, UK.

Magnetic Resonance Imaging
|May 18, 2010
PubMed
Summary
This summary is machine-generated.

Multislice methods accelerate 2D inversion-recovery T(1)-T(2) relaxation spectra acquisition to minutes. While signal/noise is reduced, impacting longitudinal relaxation times, key spectral features are preserved.

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Area of Science:

  • Magnetic Resonance Imaging
  • Spectroscopy

Background:

  • T(1)-T(2) relaxation spectra provide insights into tissue properties.
  • Traditional acquisition methods can be time-consuming.

Purpose of the Study:

  • To investigate the efficacy of multislice methods for rapid 2D inversion-recovery T(1)-T(2) relaxation spectra acquisition.
  • To assess the trade-offs between speed and data quality.

Main Methods:

  • Utilized multislice techniques by assigning unique inversion-recovery delay times to each slice.
  • Acquired 2D inversion-recovery T(1)-T(2) relaxation spectra.

Main Results:

  • Reduced acquisition times to a few minutes.
  • Observed decreased signal/noise ratio.
  • Noted shifts in component longitudinal relaxation times.
  • Maintained reproduction of major 2D relaxation spectra features.

Conclusions:

  • Multislice methods offer a significant speed enhancement for 2D T(1)-T(2) relaxation spectra.
  • The method is viable despite minor reductions in signal/noise and shifts in relaxation times.