Correction method for non-homogeneous magnetic field

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F08%3APU76054" target="_blank" >RIV/00216305:26220/08:PU76054 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Correction method for non-homogeneous magnetic field

Original language description

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 approximationprocess 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.

Czech name

Correction method for non-homogeneous magnetic field

Czech description

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 approximationprocess 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.

Type

D - Article in proceedings

CEP classification

JA - Electronics and optoelectronics

OECD FORD branch

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Project

<a href="/en/project/KJB208130603" target="_blank" >KJB208130603: Measurement and simulation of material susceptibility and conductivity influences in MR tomography</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of the International Workshop on Teleinformatics and Electromagnetic Field

ISBN

978-80-214-3718-0

ISSN

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e-ISSN

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Number of pages

5

Pages from-to

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Publisher name

UTEE, FEKT VUT v Brně

Place of publication

Paris

Event location

Paříž

Event date

Sep 8, 2008

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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