Effect of off-resonance on T1 saturation recovery measurement in inhomogeneous fields

被引：8
|
作者：
Duan, Chong [1 ,2 ]
Ryan, Colm [1 ,3 ]
Utsuzawa, Shin [1 ]
Song, Yi-Qiao [1 ]
Hurlimann, Martin D. [1 ]
机构：
[1] Schlumberger Doll Res Ctr, Cambridge, MA 02139 USA
[2] Washington Univ, Dept Chem, St Louis, MO 63110 USA
[3] Raytheon BBN Technol, Cambridge, MA 02138 USA
来源：
JOURNAL OF MAGNETIC RESONANCE | 2017年 / 281卷
关键词：
Saturation recovery; T-1; Off-resonance; Dynamic equilibrium;
D O I：
10.1016/j.jmr.2017.05.003
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
Saturation-recovery measurements with Carr-Purcell-Meiboom-Gill sequences are commonly employed to measure the longitudinal relaxation time constant, T-1, in grossly inhomogeneous fields. We show that in general the off-resonant effect generates unexpected extra signals in the T-1 measurement. In the present study, we derive a modified T-1, kernel that accounts for this off-resonance effect quantitatively. The new kernel has been tested with numerical simulations and experiments, and excellent agreement is found. (C) 2017 Elsevier Inc. All rights reserved.
引用
收藏
页码：31 / 43
页数：13
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