Detail publikace

Correction method for non-homogeneous magnetic field

Originální název

Correction method for non-homogeneous magnetic field

Anglický název

Correction method for non-homogeneous magnetic field

Jazyk

en

Originální abstrakt

In this work, we developed a method, which is used for approximation of basic magnetic field B0 inside a specific spherical volume. This method uses Legendre multinominals expansion of magnetic flux density measured in discrete points on spherical volume. Using optimization technique of Least square method we modeled map of magnetic flux density on the desired surface and compared it to measured values of magnetic flux density. The coefficients of spherical function expansion obtained from approximation process can be used for determination of shimming currents which are feeding correction coils of tomograph. The results of approximated fields are described and compared to measured fields in the experimental part of this article.

Anglický abstrakt

In this work, we developed a method, which is used for approximation of basic magnetic field B0 inside a specific spherical volume. This method uses Legendre multinominals expansion of magnetic flux density measured in discrete points on spherical volume. Using optimization technique of Least square method we modeled map of magnetic flux density on the desired surface and compared it to measured values of magnetic flux density. The coefficients of spherical function expansion obtained from approximation process can be used for determination of shimming currents which are feeding correction coils of tomograph. The results of approximated fields are described and compared to measured fields in the experimental part of this article.

BibTex


@inproceedings{BUT27567,
  author="Karel {Bartušek} and Michal {Hadinec}",
  title="Correction method for non-homogeneous magnetic field",
  annote="In this work, we developed a method, which is used for approximation of basic magnetic field B0 inside a specific spherical volume. This method uses Legendre multinominals expansion of magnetic flux density measured in discrete points on spherical volume. Using optimization technique of Least square method we modeled map of magnetic flux density on the desired surface and compared it to measured values of magnetic flux density. The coefficients of spherical function expansion obtained from approximation process can be used for determination of shimming currents which are feeding correction coils of tomograph. The results of approximated fields are described and compared to measured fields in the experimental part of this article.",
  address="UTEE, FEKT VUT v Brně",
  booktitle="Proceedings of the International Workshop on Teleinformatics and Electromagnetic Field",
  chapter="27567",
  howpublished="electronic, physical medium",
  institution="UTEE, FEKT VUT v Brně",
  year="2008",
  month="september",
  pages="1--5",
  publisher="UTEE, FEKT VUT v Brně",
  type="conference paper"
}