Publication detail

Checking the quality of gradient magnetic fields in MR tomography

BARTUŠEK, K., GESCHEIDTOVÁ, E., KUBÁSEK, R.

Original Title

Checking the quality of gradient magnetic fields in MR tomography

English Title

Checking the quality of gradient magnetic fields in MR tomography

Type

conference paper

Language

en

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.

English 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

RIV year

2006

Released

14.09.2006

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",
  annote="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.",
  address="VUT Brno",
  booktitle="Electronic Devices and Systems",
  chapter="19163",
  howpublished="print",
  institution="VUT Brno",
  year="2006",
  month="september",
  pages="189--194",
  publisher="VUT Brno",
  type="conference paper"
}