Sensitivity Enhancement in Magnetic Resonance
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Second-order phase correction of NMR spectra acquired using linear frequency-sweeps
2022, Magnetic Resonance LettersEffects of apodization smoothing and denoising on spectral fitting
2020, Magnetic Resonance ImagingCitation Excerpt :For this reason, the Fourier transform to the frequency-domain is typically done prior to spectral analysis or incorporated into the analysis algorithm. Historically, spectral filtering by apodization with a weighting function matched to the decay envelope of the spectral lineshape has been used to maximize the spectral signal-to-noise (SNR) ratio and the application of this preprocessing step has the potential to improve quantitation accuracy through the reduction of noise while also improving the visual review. [7] However, apodization smoothing is known to increase the spectral linewidth and it has been widely assumed that such methods should not be applied prior to applying a parametric fitting procedure.
Non-uniform HYSCORE: Measurement, processing and analysis with Hyscorean
2019, Journal of Magnetic ResonanceCitation Excerpt :However, the relative intensities of the sampling artifacts depend on the specifics of the NUS grid employed. Further work to improve the sensitivity of NUS spectra has been carried out in the form of envelope-matched sampling (EMS) [4,20,22] and beat-matched sampling (BMS) [4,22], where the random sampling is matched to some probability density function, e.g. an exponential function matched to the signal decay [21,23]. Despite all efforts, to date there is still no complete understanding of the optimal design of NUS sampling schemes [4].
Polarization recovery during ASAP and SOFAST/ALSOFAST-type experiments
2019, Journal of Magnetic ResonanceBoosting sensitivity and suppressing artifacts via multi-acquisition in direct polarization NMR experiments with small flip-angle pulses
2018, Journal of Magnetic Resonance