3-D FEM analysis of residual magnetism produced by x-gradient coil of permanent magnet type of MRI

Norio Takahashi, Atsushi Muraoka, Daisuke Miyagi, Koji Miyata, Ken Ohashi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The detailed analysis of residual magnetization in permanent magnet type of magnetic resonance imaging (MRI) is important for the improvement of MRI image. The behavior of residual magnetization produced by the z-gradient coil is already reported. As 3-D analysis is strictly required for investigating the residual magnetization produced by the x- or y-gradient coil, the report about such a behavior is few. In this paper, the minor loop and residual magnetization produced by the x-gradient coil in a 3-D model are examined. The useful knowledge for understanding the behavior of the disturbance field due to the residual magnetization in the pole piece, etc., is obtained.

Original languageEnglish
Pages (from-to)1809-1812
Number of pages4
JournalIEEE Transactions on Magnetics
Volume43
Issue number4
DOIs
Publication statusPublished - 2007 Apr 1

Keywords

  • Finite-element method (FEM)
  • Hysteresis
  • Magnetic resonance imaging (MRI)
  • Minor loop

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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