Design of an axisymmetric permanent magnet structure for magnetic resonance tomography

Author

Molfino, Paolo ; Repetto, Manuela ; Bixio, A. ; Dal Mut, G. ; Marabotto, R.

Author_Institution

Dept. of Electr. Eng., Genova Univ., Italy

Volume

24

Issue

2

fYear

1988

fDate

3/1/1988 12:00:00 AM

Firstpage

994

Lastpage

997

Abstract

New Nd-Fe-B permanent magnet materials are considered to have interesting characteristics for the realization of tomographs for magnetic resonance imaging. To provide a comparison between these structures and superconducting or resistive magnets, the design of an axisymmetric permanent magnet for MRI has been carried out using a general-purpose code for electromagnetic-field computation that also allowed for the analysis of anisotropic media. The main computational difficulties due to the field uniformity requirements are analyzed. The obtained results are displayed and the design criteria used, as well as the optimizations performed, are described and discussed.

Keywords

biomedical NMR; boron alloys; iron alloys; neodymium alloys; permanent magnets; Nd-Fe-B permanent magnet materials; axisymmetric permanent magnet; computational difficulties; design; electromagnetic-field computation; field uniformity requirements; magnetic resonance tomography; Anisotropic magnetoresistance; Electromagnetic analysis; Magnetic analysis; Magnetic materials; Magnetic resonance; Magnetic resonance imaging; Permanent magnets; Superconducting magnets; Superconducting materials; Tomography;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.11395

Filename

11395