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BARTUŠEK, K. GESCHEIDTOVÁ, E.
Originální název
MRI method of diffusion measurement in heterogeneous materials
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
he paper describes a newly proposed magnetic resonance (MR) method and the processing of signals being measured, with the aim of establishing the diffusion coefficients in heterogeneous materials. The pulsed field gradient stimulated-echo methods have reduced coupling between the applied magnetic field gradient and a constant internal magnetic field gradient caused by different susceptibilities throughout the sample. When studying systems where it is necessary to keep the duration of the pulse sequence at a minimum or to study diffusion as a function of observation time, the spin-echo method should be chosen. The basic idea is to acquire the spin echo amplitude with pulsed field gradient of opposite signs and to add/subtract the NMR signals measured in a suitable way. The measuring method and the digital signal processing enable eliminating the effect of static magnetic field on the accuracy of measuring. The method proposed can be used to measure diffusion-weighted images of liquids found in porous materials, and in the development of new MR tomography measuring methods in the Institute of Scientific Instruments of the Academy of Sciences of the Czech Republic, v.v.i.
Klíčová slova
Diffusion measurement, diffusion coefficients, nuclear magnetic resonance, heterogeneous systems, diffusion-weighted image.
Autoři
BARTUŠEK, K.; GESCHEIDTOVÁ, E.
Rok RIV
2008
Vydáno
13. 3. 2008
Nakladatel
IOP Publishing
Místo
UK
ISSN
0957-0233
Periodikum
Measurement Science and Technology
Ročník
19
Číslo
1
Stát
Spojené království Velké Británie a Severního Irska
Strany od
Strany do
8
Strany počet
BibTex
@article{BUT44785, author="Karel {Bartušek} and Eva {Gescheidtová}", title="MRI method of diffusion measurement in heterogeneous materials", journal="Measurement Science and Technology", year="2008", volume="19", number="1", pages="1--8", issn="0957-0233" }