Assessing signal enhancement in distant dipolar field-based sequences
2007; Elsevier BV; Volume: 189; Issue: 1 Linguagem: Inglês
10.1016/j.jmr.2007.08.015
ISSN1096-0856
AutoresWilson Barros, Daniel F. Gochberg, John C. Gore,
Tópico(s)Advanced MRI Techniques and Applications
ResumoThe 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 T1 ≫ T2, 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 T1 relaxation. Here, we use analytical calculations to investigate the source of this improved signal and determine the maximum enhancement provided by the method.
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