Department of Physics, Fujian Key Laboratory of Plasma and Magnetic Resonance, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Jun;79(1):112-7. doi: 10.1016/j.saa.2011.02.020. Epub 2011 Feb 13.
In this paper, we demonstrated that despite the insensitivity of intermolecular zero-quantum coherences (iZQCs) to B(0) variations, the influence of unstable fields on the observable single-quantum coherence signals causes strong t(1) noises in the high-resolution iZQC projection spectra. Stroboscopic acquisition was then proposed for noise suppression. The feasibility of the modified sequences with the proposed acquisition scheme was verified by computer simulations and experiments in different unstable fields generated by the Z0 and Z1 coil current oscillations, which mimic the unstable fields of NMR using externally powered magnets and MRS in the presence of physiological motions, respectively.
在本文中，我们证明了尽管分子间零量子相干（iZQCs）对 B(0)变化不敏感，但不稳定场对可观测单量子相干信号的影响会导致高分辨率 iZQC 投影谱中的强 t(1)噪声。然后提出了频闪采集来抑制噪声。通过计算机模拟和在 Z0 和 Z1 线圈电流振荡产生的不同不稳定场中的实验，验证了具有所提出采集方案的改进序列的可行性，这些不稳定场分别模拟了使用外部供电磁铁的 NMR 中的不稳定场和存在生理运动时的 MRS。
