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The 'DANTE' experiment.

Ray Freeman1, Gareth A Morris

  • 1Cambridge University, Jesus College, Jesus Lane, Cambridge CB5 8BL, UK. rf110@hermes.cam.ac.uk

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|September 13, 2011
PubMed
Summary
This summary is machine-generated.

The DANTE technique provides precise NMR excitation for various applications. This method enhances resolution and speeds up spectroscopy, proving valuable in imaging and chemical studies.

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Area of Science:

  • Nuclear Magnetic Resonance (NMR) Spectroscopy
  • Magnetic Resonance Imaging (MRI)

Background:

  • The DANTE (Delays Alternating with Nutations for Tailored Excitation) technique is a selective excitation method in NMR.
  • It allows for excitation restricted to a narrow frequency band, typically a single resonance line.

Purpose of the Study:

  • To explore the versatility and applications of the DANTE excitation scheme.
  • To demonstrate its utility in enhancing NMR spectroscopy and MRI.

Main Methods:

  • Utilizing DANTE for selective excitation in NMR experiments.
  • Applying magnetic field gradients to improve resolution.
  • Employing multiple DANTE excitations with Hadamard encoding for faster spectroscopy.
  • Implementing DANTE sequences in cardiac MRI for motion monitoring.

Main Results:

  • DANTE successfully restricted excitation to single resonance lines.
  • The method was extended to water presaturation, relaxation measurements, and chemical exchange studies.
  • Resolution enhancement was achieved by restricting the sample volume using magnetic field gradients.
  • Multidimensional spectroscopy speed was significantly increased using Hadamard encoding with DANTE.
  • Cardiac imaging with superimposed grids allowed real-time monitoring of motional distortions.

Conclusions:

  • DANTE is a simple yet effective technique for selective NMR excitation.
  • Its applications span from fundamental NMR studies to advanced imaging techniques.
  • DANTE offers significant advantages in resolution enhancement and speed for spectroscopic and imaging methods.