3-D FEM Analysis of Residual Magnetism Produced by x-Gradient Coil of Permanent Magnet Type of MRI

Author

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

Author_Institution

Dept. of Electr. & Electron. Eng., Okayama Univ.

Volume

43

Issue

4

fYear

2007

fDate

4/1/2007 12:00:00 AM

Firstpage

1809

Lastpage

1812

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

Keywords

finite element analysis; magnetic resonance imaging; magnetisation; permanent magnets; 3D FEM analysis; MRI image; magnetic resonance imaging; permanent magnet; residual magnetization; x-gradient coil; Chemical analysis; Chemical engineering; Coils; Current distribution; Magnetic analysis; Magnetic hysteresis; Magnetic resonance imaging; Magnetization; Permanent magnets; Research and development; Finite-element method (FEM); hysteresis; magnetic resonance imaging (MRI); minor loop;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.892526

Filename

4137824