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BARTUŠEK, K., GESCHEIDTOVÁ, E., KUBÁSEK, R.
Original Title
Checking the quality of gradient magnetic fields in MR tomography
Type
conference paper
Language
English
Original Abstract
Imaging techniques based on the principle of nuclear magnetic resonance (MRI) can be used in the study of molecular transport phenomena in biological systems such as self-diffusion processes. The precision of determining the diffusion constants depends on generating the gradient pulse with high precision. For the purpose of determining the characteristics of time behavior of gradient pulses a simple measuring method was developed and experimentally tested on a 4.7 T tomograph. The method is based on the principle of measuring the instantaneous frequency of MR signal in the presence of gradient pulse after the excitation of a thin defined layer of the examined specimen placed outside the gradient field centre. Using the above method, errors were found in the amplitude and time integral of generated gradient fields and in determining the diffusion constants for biological tissues.
Keywords
MR, NMR, magnetic field quality estimation
Authors
RIV year
2006
Released
14. 9. 2006
Publisher
VUT Brno
Location
Brno
ISBN
80-214-3246
Book
Electronic Devices and Systems
Pages from
189
Pages to
194
Pages count
5
BibTex
@inproceedings{BUT19163, author="Karel {Bartušek} and Eva {Gescheidtová} and Radek {Kubásek}", title="Checking the quality of gradient magnetic fields in MR tomography", booktitle="Electronic Devices and Systems", year="2006", pages="189--194", publisher="VUT Brno", address="Brno", isbn="80-214-3246" }