相干路径选择和齿轮周期的计算。
Calculation of coherence pathway selection and cogwheel cycles.
作者信息
Jerschow Alexej, Kumar Rajeev
机构信息
Department of Chemistry, New York University, 100 Washington Square East, 10003, New York, NY, USA.
出版信息
J Magn Reson. 2003 Jan;160(1):59-64. doi: 10.1016/s1090-7807(02)00031-9.
The selection of proper coherence pathways is a very important aspect of the design of NMR pulse sequences. This article describes a C++ program for the calculation of coherence pathway selection via phase cycles, including a module to calculate cogwheel cycles. Cogwheel phase cycles shorter than the original ones [M.H. Levitt et al., J. Magn. Reson. 155 (2002) 300] are derived and experimentally tested for the MQMAS experiment for 3/2 spins. Some other cogwheel cycles are derived for the MQNQMAS, the STMAS experiment, and a PFG diffusion pulse sequence. This program is publicly available through our website http://www.nyu.edu/projects/jerschow with additional documentation and examples.
选择合适的相干路径是核磁共振脉冲序列设计中非常重要的一个方面。本文描述了一个用C++编写的程序，用于通过相位循环计算相干路径选择，其中包括一个计算齿轮循环的模块。推导了比原始循环更短的齿轮相位循环[M.H. 莱维特等人，《磁共振杂志》155 (2002) 300]，并针对3/2自旋的多量子魔角旋转实验（MQMAS）进行了实验测试。还为多量子非均匀魔角旋转实验（MQNQMAS）、超极化魔角旋转实验（STMAS）以及一个脉冲场梯度扩散脉冲序列推导了其他一些齿轮循环。该程序可通过我们的网站http://www.nyu.edu/projects/jerschow公开获取，并附有更多文档和示例。
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