Improving resolution in multidimensional NMR using random quadrature detection with compressed sensing reconstruction.
Improving resolution in multidimensional NMR using random quadrature detection with compressed sensing reconstruction.
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DOI:
10.1007/s10858-016-0062-9
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发表时间:
2017-06
影响因子:
2.7
通讯作者:
Nietlispach D
中科院分区:
文献类型:
--
作者:
Bostock MJ;Holland DJ;Nietlispach D
NMR spectroscopy is central to atomic resolution studies in biology and chemistry. Key to this approach are multidimensional experiments. Obtaining such experiments with sufficient resolution, however, is a slow process, in part since each time increment in every indirect dimension needs to be recorded twice, in quadrature. We introduce a modified compressed sensing (CS) algorithm enabling reconstruction of data acquired with random acquisition of quadrature components in gradient-selection NMR. We name this approach random quadrature detection (RQD). Gradient-selection experiments are essential to the success of modern NMR and with RQD, a 50 % reduction in the number of data points per indirect dimension is possible, by only acquiring one quadrature component per time point. Using our algorithm (CSRQD), high quality reconstructions are achieved. RQD is modular and combined with non-uniform sampling we show that this provides increased flexibility in designing sampling schedules leading to improved resolution with increasing benefits as dimensionality of experiments increases, with particular advantages for 4- and higher dimensional experiments. The online version of this article (doi:10.1007/s10858-016-0062-9) contains supplementary material, which is available to authorized users.
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