Publication detail

Diffusion MRI: magnetic field inhomogeneities mitigation

MARCOŇ, P. BARTUŠEK, K. GESCHEIDTOVÁ, E. DOKOUPIL, Z.

Original Title

Diffusion MRI: magnetic field inhomogeneities mitigation

Type

journal article - other

Language

English

Original Abstract

The article reports on certain artifacts that emerge during the in vitro diffusion-weighted imaging of physical samples. In this context, the authors analyze the influence of magnetic field inhomogeneity, temperature, or eddy currents and consider procedures to mitigation of the artifacts. A technique reducing the examined spurious effects was designed, experimentally verified, and denominated as the three measurements method. The technique proved to be useful mainly for the evaluation of a DWI image measured with a diffusion gradient in the z axis, where the relative measurement error decreased to 3.38% (during measurement using two images, the relative error was greater than 19%). For small errors within the measurement of diffusion constants of a deionised water sample (<5%) it is necessary to select a b-factor value larger than 200x10^6 s.m-2. Temperature stabilisation with an accuracy better than 0.1 degree of celsius during the entire measuring process is a necessary prerequisite for the measurement of biological or material samples with a relative accuracy lower than 1%.

Keywords

correction, diffusion, inhomogeneity, eddy currents, magnetic resonance

Authors

MARCOŇ, P.; BARTUŠEK, K.; GESCHEIDTOVÁ, E.; DOKOUPIL, Z.

RIV year

2012

Released

17. 9. 2012

Publisher

Versita Open, Versita Ltd. London

Location

London, Great Britain

ISBN

1335-8871

Periodical

Measurement Science Review

Year of study

12

Number

5

State

Slovak Republic

Pages from

205

Pages to

212

Pages count

8

URL

http://www.measurement.sk/2012/Marcon.pdf

BibTex

@article{BUT93943,
  author="Petr {Marcoň} and Karel {Bartušek} and Eva {Gescheidtová} and Zdeněk {Dokoupil}",
  title="Diffusion MRI: magnetic field inhomogeneities mitigation",
  journal="Measurement Science Review",
  year="2012",
  volume="12",
  number="5",
  pages="205--212",
  issn="1335-8871",
  url="http://www.measurement.sk/2012/Marcon.pdf"
}