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Statements

Subject Item
n2:RIV%2F00216305%3A26220%2F08%3APU74580%21RIV10-MSM-26220___
rdf:type
n10:Vysledek skos:Concept
dcterms:description
The sensitivity of spectroscopic methods based on nuclear magnetic resonance is limited, in particular by the magnitude of noise in the signal being measured. In MR tomography and, above all, in localized spectroscopy and spectroscopic MR imaging, this problem becomes even more pronounced. When gradient magnetic fields are used, it cannot be fully ruled out that there will be a change in the basic magnetic field due to the eddy currents in conducting materials in the neighbourhood of the sample being measured. This results in a local change in instantaneous frequency of the resonance of nuclei and in a distortion of spectral lines or MR image. For methods that eliminate this distortion and for an accurate calculation of the constants of (in particular long) pre-emphasis filters, techniques have been developed and experimentally tested that are based on measuring the instantaneous frequency of the signal detected with a very low signal-to-noise ratio. Adaptive filtering methods and filtering based on f The sensitivity of spectroscopic methods based on nuclear magnetic resonance is limited, in particular by the magnitude of noise in the signal being measured. In MR tomography and, above all, in localized spectroscopy and spectroscopic MR imaging, this problem becomes even more pronounced. When gradient magnetic fields are used, it cannot be fully ruled out that there will be a change in the basic magnetic field due to the eddy currents in conducting materials in the neighbourhood of the sample being measured. This results in a local change in instantaneous frequency of the resonance of nuclei and in a distortion of spectral lines or MR image. For methods that eliminate this distortion and for an accurate calculation of the constants of (in particular long) pre-emphasis filters, techniques have been developed and experimentally tested that are based on measuring the instantaneous frequency of the signal detected with a very low signal-to-noise ratio. Adaptive filtering methods and filtering based on f
dcterms:title
Digital Filter Banks in MR Measurement of Gradient Magnetic Fields Digital Filter Banks in MR Measurement of Gradient Magnetic Fields
skos:prefLabel
Digital Filter Banks in MR Measurement of Gradient Magnetic Fields Digital Filter Banks in MR Measurement of Gradient Magnetic Fields
skos:notation
RIV/00216305:26220/08:PU74580!RIV10-MSM-26220___
n3:aktivita
n19:Z n19:P
n3:aktivity
P(GA102/07/0389), P(GA102/07/1086), Z(AV0Z20650511), Z(MSM0021630513)
n3:cisloPeriodika
4
n3:dodaniDat
n9:2010
n3:domaciTvurceVysledku
n5:4095499 n5:6157165 n5:5918367 n5:4075439
n3:druhVysledku
n4:J
n3:duvernostUdaju
n14:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
363616
n3:idVysledku
RIV/00216305:26220/08:PU74580
n3:jazykVysledku
n11:eng
n3:klicovaSlova
Digital filter, bank of filters, NMR, instantenous frequency
n3:klicoveSlovo
n17:bank%20of%20filters n17:instantenous%20frequency n17:Digital%20filter n17:NMR
n3:kodStatuVydavatele
AT - Rakouská republika
n3:kontrolniKodProRIV
[75393C1A1C5F]
n3:nazevZdroje
Applied Magnetic Resonance (IF 0,665)
n3:obor
n6:JA
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n13:GA102%2F07%2F1086 n13:GA102%2F07%2F0389
n3:rokUplatneniVysledku
n9:2008
n3:svazekPeriodika
33
n3:tvurceVysledku
Gescheidtová, Eva Bartušek, Karel Kubásek, Radek Smékal, Zdeněk
n3:wos
000255874300005
n3:zamer
n8:AV0Z20650511 n8:MSM0021630513
s:issn
0937-9347
s:numberOfPages
19
n12:organizacniJednotka
26220