Publication detail

Generalised MRI signal model - a transparent way from RF signal to images

JAN, J.

Original Title

Generalised MRI signal model - a transparent way from RF signal to images

Czech Title

Zobecnený model v MRI zobrazení - transparentní cesta od RF signálu k obrazu

English Title

Generalised MRI signal model - a transparent way from RF signal to images

Type

conference paper

Language

en

Original Abstract

The commonly used integral models of MRI signal are based on volume distribution of the static proton density as the signal source, sometimes modified by a multiplicative relaxation factor. By replacing this source function by the time-variable transversal magnetisation, a generalisation is obtained that enables to describe the MRI principles, different imaging techniques and image reconstruction methods in a transparent and consistent way. The generalisation enables to include all the relaxation phenomena and differently weighted imaging into consideration. Also, the artefacts related to time-variance of the magnetisation distribution due to any other origin (e.g. flow and diffusion) can be included in the model as well. This way, even relatively complex phenomena like the time-variance of the magnetisation during data acquisition in fast MRI under complicated circumstances may in principle be included with a potential for deeper (perhaps numerical) analysis. Several examples of using the model to explain consistently the common MRI techniques are appended.

Czech abstract

Je prezentová transparentní model vzniku MRI signálu, zalozený na predstave zdroje v podobe casove i prostorove variantní transversální magnetizace. Takový model umoznuje popsat principy zobrazení magnetickou rezonancí, ruzné zobrazovací techniky a rekonstrukci obrazu z merených dat konzistentním a transparentním zpusobem.

English abstract

The commonly used integral models of MRI signal are based on volume distribution of the static proton density as the signal source, sometimes modified by a multiplicative relaxation factor. By replacing this source function by the time-variable transversal magnetisation, a generalisation is obtained that enables to describe the MRI principles, different imaging techniques and image reconstruction methods in a transparent and consistent way. The generalisation enables to include all the relaxation phenomena and differently weighted imaging into consideration. Also, the artefacts related to time-variance of the magnetisation distribution due to any other origin (e.g. flow and diffusion) can be included in the model as well. This way, even relatively complex phenomena like the time-variance of the magnetisation during data acquisition in fast MRI under complicated circumstances may in principle be included with a potential for deeper (perhaps numerical) analysis. Several examples of using the model to explain consistently the common MRI techniques are appended.

Keywords

MRI signal, transversal magnetisation, relaxation phenomena, fast MRI, image reconstruction, multidimensional Fourier transform

RIV year

2004

Released

20.06.2004

Publisher

VUTIUM Brno

Location

Brno

ISBN

80-214-2633-0

Book

Proc. 17th International EURASIP conference BIOSIGNAL 2004

Pages from

1

Pages to

6

Pages count

6

URL

knihovna UBMI

BibTex


@inproceedings{BUT9132,
  author="Jiří {Jan}",
  title="Generalised MRI signal model - a transparent way from RF signal to images",
  annote="The commonly used integral models of MRI signal are based on volume distribution of the static proton density as the signal source, sometimes modified by a multiplicative relaxation factor.  By replacing this source function by the time-variable transversal magnetisation, a generalisation is obtained that enables to describe the MRI principles, different imaging techniques and image reconstruction methods in a transparent and consistent way. The generalisation enables to include all the relaxation phenomena and differently weighted imaging into consideration. Also, the artefacts related to time-variance of the magnetisation distribution due to any other origin (e.g. flow and diffusion) can be included in the model as well. This way, even relatively complex phenomena like the time-variance of the magnetisation during data acquisition in fast MRI under complicated circumstances may in principle be included with a potential for deeper (perhaps numerical) analysis. Several examples of using the model to explain consistently the common MRI techniques are appended.",
  address="VUTIUM  Brno",
  booktitle="Proc. 17th International EURASIP conference BIOSIGNAL 2004",
  chapter="9132",
  institution="VUTIUM  Brno",
  year="2004",
  month="june",
  pages="1",
  publisher="VUTIUM  Brno",
  type="conference paper"
}