کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5407710 1393227 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of zero-filling and apodization on spectral integrals in discrete Fourier-transform spectroscopy of noisy data
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Effects of zero-filling and apodization on spectral integrals in discrete Fourier-transform spectroscopy of noisy data
چکیده انگلیسی
The influence of noise on the standard deviation of spectral integrals is examined. Calculations assuming discrete Fourier-transform data are compared with Monte-Carlo simulations. The effects of zero-filling and apodization are examined for free-induction-decay (FID) signals and for symmetric spin-echo signals in one and two dimensions, with particular attention to features not previously presented in the literature. Findings suggest that for mild apodization, the known sensitivity enhancement due to zero-filling in either the real or the imaginary part signal [E. Bartholdi, R.R. Ernst, Fourier spectroscopy and the causality principle, J. Magn. Reson., 11 (1973) 9-19] is maintained; however, for stronger apodization filters, this enhancement can be obliterated completely. It is shown that results obtained by analysis of one-dimensional signals can be readily applied to multi-dimensional data. Furthermore, zero-filling has a negligible effect for symmetric spin-echo signals with implications for signal averaging in magnetic resonance imaging and spectroscopic imaging.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetic Resonance - Volume 182, Issue 2, October 2006, Pages 330-338
نویسندگان
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