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首页> 外文期刊>Journal of magnetic resonance >DOUBLESLICING: A non-iterative single profile multi-exponential curve resolution procedure - Application to time-domain NMR transverse relaxation data
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DOUBLESLICING: A non-iterative single profile multi-exponential curve resolution procedure - Application to time-domain NMR transverse relaxation data

机译：双工：一种非迭代的单轮廓多指数曲线解析程序-在时域NMR横向弛豫数据中的应用

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摘要

A new non-iterative curve resolution technique for resolving single decay profiles is proposed. The new technique, called DOUBLESLICING, is based on the DECRA (Direct Exponential Curve Resolution Algorithm) principle. While the original DECRA was designed to resolve several decay curves simultaneously and thus fitting common pure exponentials, DOUBLESLICING can resolve single decay profiles by a simple double data transformation followed by an analytical and unique three-way decomposition. The new approach is successfully demonstrated on experimental NMR CPMG relaxation data, measured on combinations of unmixed paramagnetic CUSO4 solutions. Decay signals of the water component were acquired following an innovative experimental design that ensured no interaction between the components present in each sample under observation. DOUBLESLICING proved to be accurate in estimating relaxation times differing in one order of magnitude (range: 19.6-159.4 ms). Its performance was comparable to discrete exponential fitting with the advantage of being much faster - in terms of computation time, DOUBLESLICING outperformed exponential fitting by a factor of four. (c) 2007 Elsevier Inc. All rights reserved.
机译：提出了一种新的非迭代曲线解析技术，用于求解单个衰减曲线。这项称为DOUBLESLICING的新技术是基于DECRA（直接指数曲线分辨率算法）原理的。最初的DECRA旨在同时解析多个衰变曲线并因此拟合常见的纯指数，而DOUBLESLICING可以通过简单的双数据转换，然后进行分析和独特的三向分解来解析单个衰变曲线。在未混合顺磁性CUSO4溶液的组合上测量的实验NMR CPMG弛豫数据上成功证明了该新方法。经过创新的实验设计，获得了水成分的衰减信号，该实验设计可确保观察到的每个样品中的水成分之间都没有相互作用。事实证明，双倍估计在估计弛豫时间方面是准确的，而弛豫时间只有一个数量级（范围：19.6-159.4 ms）。它的性能可与离散指数拟合相媲美，并且具有更快的优势-就计算时间而言，双倍比指数拟合要好四倍。 （c）2007 Elsevier Inc.保留所有权利。

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