PMID- 16844391
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20061130
LR  - 20061003
IS  - 1090-7807 (Print)
IS  - 1090-7807 (Linking)
VI  - 182
IP  - 2
DP  - 2006 Oct
TI  - Effects of zero-filling and apodization on spectral integrals in discrete 
      Fourier-transform spectroscopy of noisy data.
PG  - 330-8
AB  - 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.
FAU - Ebel, Andreas
AU  - Ebel A
AD  - Department of Radiology, University of California San Francisco, DVA Medical 
      Center San Francisco, MR Unit (114M), 4150 Clement St., San Francisco, CA 94121, 
      USA. andreas.ebel@ucsf.edu
FAU - Dreher, Wolfgang
AU  - Dreher W
FAU - Leibfritz, Dieter
AU  - Leibfritz D
LA  - eng
PT  - Journal Article
DEP - 20060717
PL  - United States
TA  - J Magn Reson
JT  - Journal of magnetic resonance (San Diego, Calif. : 1997)
JID - 9707935
EDAT- 2006/07/18 09:00
MHDA- 2006/07/18 09:01
CRDT- 2006/07/18 09:00
PHST- 2006/03/15 00:00 [received]
PHST- 2006/06/12 00:00 [revised]
PHST- 2006/06/25 00:00 [accepted]
PHST- 2006/07/18 09:00 [pubmed]
PHST- 2006/07/18 09:01 [medline]
PHST- 2006/07/18 09:00 [entrez]
AID - S1090-7807(06)00191-1 [pii]
AID - 10.1016/j.jmr.2006.06.026 [doi]
PST - ppublish
SO  - J Magn Reson. 2006 Oct;182(2):330-8. doi: 10.1016/j.jmr.2006.06.026. Epub 2006 
      Jul 17.