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Apparent diffusion behaviors of spins in the presence of distant dipolar field in two-component solution NMR

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Apparent diffusion behaviors of spins in the presence of distant dipolar field in two-component solution NMR.htm (402bytes)
Date
2011-01
Author
Shen, Guiping
Cai, Congbo
Chen, Zhong
陈忠
Cai, Shuhui
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  • 化学化工-已发表论文 [14469]
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Abstract
The diffusion behaviors of spins in the presence of distant dipolar field in two-component spin systems during the second evolution period of a modified CRAZED sequence before acquisition were investigated. Theoretical formulas were deduced based on the distant dipolar field model. The simulation results and experimental observations are consistent with the theoretical predictions. This study shows that the relative intensities of signals from intermolecular zero-quantum coherences (iZQCs) and intermolecular double-quantum coherences (iDQCs) have the same diffusion attenuation characteristic under the combined effect of diffusion weighting gradients and distant dipolar field during the second evolution period. This diffusion attenuation may be different from that of conventional single-quantum coherence signal, depending on the relative orientation of the diffusion weighting gradients to the coherence selection gradients. The results presented herein are helpful for understanding the effect of distant dipolar field from a spin system on the diffusion behavior of other spin system and the signal properties in the iZQC or iDQC magnetic resonance imaging.
Citation
MOLECULAR PHYSICS,2011,109(15):1943-1952
URI
http://dx.doi.org/doi:10.1080/00268976.2011.600256
WOS:000295459800008
https://dspace.xmu.edu.cn/handle/2288/11825

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