The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 2017
Filed:
Oct. 06, 2011
Hideta Habara, Musashino, JP;
Yoshitaka Bito, Kokubunji, JP;
Hisaaki Ochi, Kodaira, JP;
Yoshihisa Soutome, Tokyo, JP;
Masayoshi Dohata, Yokohama, JP;
Tetsuhiko Takahashi, Tokyo, JP;
Hiroyuki Takeuchi, Kashiwa, JP;
Hideta Habara, Musashino, JP;
Yoshitaka Bito, Kokubunji, JP;
Hisaaki Ochi, Kodaira, JP;
Yoshihisa Soutome, Tokyo, JP;
Masayoshi Dohata, Yokohama, JP;
Tetsuhiko Takahashi, Tokyo, JP;
Hiroyuki Takeuchi, Kashiwa, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
There is provided a technique for suppressing increase of SAR without sacrificing sensitivity in RF coils used in MRI apparatuses. The present invention provides an antenna device comprising a sheet-shaped conductor and a ribbon-shaped conductor disposed on the subject side with respect to the sheet-shaped conductor with a predetermined distance from the sheet-shaped conductor. The ribbon-shaped conductor has a meandering shape, and is adjusted so as to resonate at transmission and reception frequencies, and it is constituted so that distance to the sheet-shaped conductor becomes smaller at both end part thereof along the static magnetic field direction compared with the distance to the sheet-shaped conductor at the center thereof. Moreover, the ribbon-shaped conductor is constituted so as to have a smaller width, as the distance to the sheet-shaped conductor becomes smaller.