Title:
埋込み形磁界成形コイルを有する開放型磁石
Document Type and Number:
Japanese Patent JP3861058
Kind Code:
B2
Abstract:
A pole piece for use in an open magnet includes a magnetizable body of generally cylindrical shape and made of a ferromagnetic material with a plurality of concentrically-arranged, annular-shaped, radially spaced-apart grooves formed in the inner surface of the pole piece. A plurality of annular-shaped, electrically conductive coils are disposed within the grooves. The pole piece with recessed shielding coils is situated within a cryogenic vessel to maintain the pole pieces at a uniform cryogenic temperature. The result is an open magnet structure which provides a highly uniform, high field, open field of view for MRI with a well-contained stray field.
Inventors:
Fan, shan louis
Palmo, Michael Anthony, Junior
Rascalis, Evangelos Triphon
Anne, Bruce Campbell
Palmo, Michael Anthony, Junior
Rascalis, Evangelos Triphon
Anne, Bruce Campbell
Application Number:
JP2002575657A
Publication Date:
December 20, 2006
Filing Date:
March 25, 2002
Export Citation:
Assignee:
GENERAL ELECTRIC COMPANY
International Classes:
A61B5/055; G01R33/3815; G01R33/381; G01R33/3875; H01F6/00
Domestic Patent References:
| JP11318858A | ||||
| JP56017553U | ||||
| JP2001052918A | ||||
| JP2001224571A |
Foreign References:
| EP1373918A1 | ||||
| US6504461 |
Attorney, Agent or Firm:
Kenichi Matsumoto
Hirokazu Ogura
Nobukazu Ito
Hirokazu Ogura
Nobukazu Ito