Dynamics of the nuclear magnetic resonance COSY-revamped by asymmetric z-gradients (CRAZED) experiment
Dynamics of the nuclear magnetic resonance COSY-revamped by asymmetric z-gradients (CRAZED) experiment
复制标题
不对称 z 梯度改进的核磁共振 COSY 动力学 (CRAZED) 实验
DOI：
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
R. Bowtell
中科院分区：
文献类型：
--
作者：
C. Ramanathan;R. Bowtell
The nuclear magnetic resonance COSY-revamped by asymmetric z-gradients experiment has been applied to a wide range of problems from functional magnetic resonance imaging to structure determination in porous media. In this article, we investigate the temporal dynamics of the experiment in the regime where the linear approximation (γμ0M0t≪1) for the signal evolution is no longer valid. Numerical solutions of the nonlinear evolution equations were obtained with and without radiation damping and compared to previous analytical approximations to explore their range of validity. Experiments were performed on cyclohexane at 11.7 T, and the signal dependence on flip angle and modulation gradient strength investigated—under conditions where the effects of radiation damping were minimized. The analytical expressions were found to be valid only when diffusion effects are either negligible or when the characteristic time for diffusional attenuation is small compared to the dipolar demagnetizing time (km2D≫γμ0M0). Exc...
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影响因子：
56.9
作者：
Warren, WS;Ahn, S;Leigh, JS
通讯作者：
Leigh, JS
影响因子：
8.6
作者：
Lin, YY;Ahn, S;Warren, WS
通讯作者：
Warren, WS
影响因子：
2.5
作者：
Richter, W;Richter, M;Ugurbil, K
通讯作者：
Ugurbil, K
影响因子：
56.9
作者：
WARREN, WS;RICHTER, W;FARMER, BT
通讯作者：
FARMER, BT