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Phasing arbitrarily sampled multidimensional NMR data

机译:分阶段任意采样的多维NMR数据

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摘要

The recent re-introduction of the two-dimensional Fourier transformation (2D-FT) has allows for the transformation of arbitrarily sampled time domain signals. In this respect, radial sampling, where two incremented time dimensions (t1 and t(2)) are sampled such that t(2) = iota cos alpha and t2 = iota sin alpha, is especially appealing because of the relatively small leakage artifacts that occur upon Fourier transformation. Unfortunately radially sampled time domain data results in a fundamental artifact in the frequency domain manifested as a ridge of intensity extending through the peak positions perpendicular to +/- the radial sampling angle. Successful removal of the ridge artifacts using existing algorithms requires absorptive line shapes. Here we present two procedures for retrospective phase correction of arbitrarily sampled data. (c) 2007 Elsevier Inc. All rights reserved.
机译:最近对二维傅立叶变换(2D-FT)的重新引入使得可以对任意采样的时域信号进行变换。在这方面,径向采样尤其吸引人,因为两个相对较小的泄漏伪影会以两个递增的时间维度(t1和t(2))进行采样,从而使t(2)= iota cos alpha,t2 = iota sin alpha。发生在傅立叶变换时。不幸的是,径向采样的时域数据导致频域中的基本伪像,表现为强度的脊延伸穿过垂直于+/-径向采样角的峰值位置。使用现有算法成功去除山脊伪影需要吸收线形。在这里,我们介绍了两种对任意采样数据进行回顾性相位校正的过程。 (c)2007 Elsevier Inc.保留所有权利。

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