Double-cavity open permanent magnet for dedicated MRI

Author

Trequattrini, A. ; Coscia, G. ; Pittaluga, S.

Author_Institution

Div. of MRI, Esaote S.p.A., Genova, Italy

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

756

Lastpage

758

Abstract

A new 0.2 T magnetic structure for dedicated (extremities) Magnetic Resonance Imaging is presented. The main features are: magnetic circuit based on rare-earth permanent magnet material and iron, ergonomic double-height cavity shape (optimized to allow shoulder, legs and joints examinations in a very compact magnet with respect to traditional whole body systems), special design of split pole plates to improve magnetic field homogeneity and reduce eddy current effects. The typical magnetic field homogeneity (a few parts per million inside the imaging volume) necessary for MRI is achieved with a special shimming procedure, also outlined in the paper. The presented magnet is part of a commercial scanner produced by Esaote S.p.A (E-SCAN/sup TM/).

Keywords

biomedical MRI; magnetic circuits; permanent magnets; 0.2 T; E-SCAN; dedicated MRI; double-cavity open permanent magnet; eddy current; ergonomic design; magnetic circuit; magnetic field homogeneity; magnetic resonance imaging; medical scanner; shimming; split pole plate; Design optimization; Ergonomics; Extremities; Iron; Joining materials; Magnetic circuits; Magnetic materials; Magnetic resonance imaging; Permanent magnets; Shape;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828341

Filename

828341