Literature DB >> 17869560

Assessing signal enhancement in distant dipolar field-based sequences.

Wilson Barros1, Daniel F Gochberg, John C Gore.   

Abstract

The possibility of improving the signal-to-noise efficiency of NMR signal refocused by long-range dipolar interactions has been discussed recently [R.T. Branca, G. Galiana, W.S. Warren, Signal enhancement in CRAZED experiments, J. Magn. Reson. 187 (2007) 38-43]. For systems where T(1)>>T(2), by including an extra radio-frequency pulse in a standard CRAZED sequence, it is possible to increase the available signal by exploiting its sensitivity to T(1) relaxation. Here, we use analytical calculations to investigate the source of this improved signal and determine the maximum enhancement provided by the method.

Mesh：

Year:  2007        PMID： 17869560      PMCID： PMC2897241          DOI： 10.1016/j.jmr.2007.08.015

Source DB:  PubMed          Journal:  J Magn Reson        ISSN： 1090-7807            Impact factor:   2.229


  5 in total

1.  Diffusion measurements using the nonlinear stimulated echo.

Authors:  I Ardelean; R Kimmich
Journal:  J Magn Reson       Date:  2000-03       Impact factor: 2.229

2.  Signal enhancement in CRAZED experiments.

Authors:  Rosa T Branca; Gigi Galiana; Warren S Warren
Journal:  J Magn Reson       Date:  2007-03-31       Impact factor: 2.229

3.  MR imaging contrast enhancement based on intermolecular zero quantum coherences.

Authors:  W S Warren; S Ahn; M Mescher; M Garwood; K Ugurbil; W Richter; R R Rizi; J Hopkins; J S Leigh
Journal:  Science       Date:  1998-07-10       Impact factor: 47.728

4.  Generation of impossible cross-peaks between bulk water and biomolecules in solution NMR.

Authors:  W S Warren; W Richter; A H Andreotti; B T Farmer
Journal:  Science       Date:  1993-12-24       Impact factor: 47.728

5.  Homogeneous NMR spectra in inhomogeneous fields.

Authors:  S Vathyam; S Lee; W S Warren
Journal:  Science       Date:  1996-04-05       Impact factor: 47.728
  5 in total
  2 in total

1.  Chemical exchange saturation transfer MRI using intermolecular double-quantum coherences with multiple refocusing pulses.

Authors:  Jianhua Lu; Congbo Cai; Shuhui Cai; Zhong Chen; Jinyuan Zhou
Journal:  Magn Reson Imaging       Date:  2014-03-14       Impact factor: 2.546

2.  Nuclear magnetic resonance signal dynamics of liquids in the presence of distant dipolar fields, revisited.

Authors:  Wilson Barros; Daniel F Gochberg; John C Gore
Journal:  J Chem Phys       Date:  2009-05-07       Impact factor: 3.488
  2 in total

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