Literature DB >> 19895019

Optimal excitation of (23)Na nuclear spins in the presence of residual quadrupolar coupling and quadrupolar relaxation.

Jae-Seung Lee1, Ravinder R Regatte, Alexej Jerschow.   

Abstract

Optimal control theory is applied for designing pulse sequences to optimally excite a spin-3/2 system with residual quadrupolar coupling in the presence of quadrupolar relaxation. A homogeneous form of the master equation is constructed to simulate the dynamics of the spin system, and a general optimization procedure with a homogeneous form of the equation of motion is described. The optimized pulses are tested with (23)Na NMR, and their performance is compared with that of pulses optimized in the absence of relaxation.

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Year:  2009        PMID： 19895019     DOI： 10.1063/1.3253970

Source DB:  PubMed          Journal:  J Chem Phys        ISSN： 0021-9606            Impact factor:   3.488


  6 in total

1.  Quadrupole sensitive pulse for signal filtering.

Authors:  Nimerovsky Evgeny; Alexej Jerschow
Journal:  J Magn Reson       Date:  2016-02-15       Impact factor: 2.229

Review 2.  Sodium MRI: methods and applications.

Authors:  Guillaume Madelin; Jae-Seung Lee; Ravinder R Regatte; Alexej Jerschow
Journal:  Prog Nucl Magn Reson Spectrosc       Date:  2014-03-07       Impact factor: 9.795

3.  Sodium inversion recovery MRI on the knee joint at 7 T with an optimal control pulse.

Authors:  Jae-Seung Lee; Ding Xia; Guillaume Madelin; Ravinder R Regatte
Journal:  J Magn Reson       Date:  2015-12-12       Impact factor: 2.229

Review 4.  Biomedical applications of sodium MRI in vivo.

Authors:  Guillaume Madelin; Ravinder R Regatte
Journal:  J Magn Reson Imaging       Date:  2013-05-30       Impact factor: 4.813

5.  Repeatability of quantitative sodium magnetic resonance imaging for estimating pseudo-intracellular sodium concentration and pseudo-extracellular volume fraction in brain at 3 T.

Authors:  Guillaume Madelin; James Babb; Ding Xia; Ravinder R Regatte
Journal:  PLoS One       Date:  2015-03-09       Impact factor: 3.240

6.  A method for estimating intracellular sodium concentration and extracellular volume fraction in brain in vivo using sodium magnetic resonance imaging.

Authors:  Guillaume Madelin; Richard Kline; Ronn Walvick; Ravinder R Regatte
Journal:  Sci Rep       Date:  2014-04-23       Impact factor: 4.379
  6 in total

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