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1. WO2010050279 - ANTENNA DEVICE AND MAGNETIC RESONANCE IMAGING DEVICE

Publication Number WO/2010/050279
Publication Date 06.05.2010
International Application No. PCT/JP2009/063110
International Filing Date 22.07.2009
IPC
A61B 5/055 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
05Measuring for diagnosis by means of electric currents or magnetic fields
055involving electronic or nuclear magnetic resonance, e.g. magnetic resonance imaging
CPC
A61B 5/055
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
05Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
055involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
G01R 33/34007
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
28Details of apparatus provided for in groups G01R33/44 - G01R33/64
32Excitation or detection systems, e.g. using radio frequency signals
34Constructional details, e.g. resonators ; , specially adapted to MR
34007Manufacture of RF coils, e.g. using printed circuit board technology; additional hardware for providing mechanical support to the RF coil assembly or to part thereof, e.g. a support for moving the coil assembly relative to the remainder of the MR system
G01R 33/34046
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
28Details of apparatus provided for in groups G01R33/44 - G01R33/64
32Excitation or detection systems, e.g. using radio frequency signals
34Constructional details, e.g. resonators ; , specially adapted to MR
34046Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
G01R 33/34053
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
28Details of apparatus provided for in groups G01R33/44 - G01R33/64
32Excitation or detection systems, e.g. using radio frequency signals
34Constructional details, e.g. resonators ; , specially adapted to MR
34046Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
34053Solenoid coils; Toroidal coils
G01R 33/34061
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
28Details of apparatus provided for in groups G01R33/44 - G01R33/64
32Excitation or detection systems, e.g. using radio frequency signals
34Constructional details, e.g. resonators ; , specially adapted to MR
34046Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
34061Helmholtz coils
G01R 33/341
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
28Details of apparatus provided for in groups G01R33/44 - G01R33/64
32Excitation or detection systems, e.g. using radio frequency signals
34Constructional details, e.g. resonators ; , specially adapted to MR
341comprising surface coils
Applicants
  • 株式会社 日立メディコ HITACHI MEDICAL CORPORATION [JP]/[JP] (AllExceptUS)
  • 羽原 秀太 HABARA, Hideta [JP]/[JP] (UsOnly)
  • 尾藤 良孝 BITO, Yoshitaka [JP]/[JP] (UsOnly)
  • 越智 久晃 OCHI, Hisaaki [JP]/[JP] (UsOnly)
  • 五月女 悦久 SOUTOME, Yoshihisa [JP]/[JP] (UsOnly)
  • 金子 幸生 KANEKO, Yukio [JP]/[JP] (UsOnly)
  • 土畑 正良 DOHATA, Masayoshi [JP]/[JP] (UsOnly)
Inventors
  • 羽原 秀太 HABARA, Hideta
  • 尾藤 良孝 BITO, Yoshitaka
  • 越智 久晃 OCHI, Hisaaki
  • 五月女 悦久 SOUTOME, Yoshihisa
  • 金子 幸生 KANEKO, Yukio
  • 土畑 正良 DOHATA, Masayoshi
Agents
  • 特許業務法人 山王坂特許事務所 Sannozaka Patent Law Firm
Priority Data
2008-27805929.10.2008JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) ANTENNA DEVICE AND MAGNETIC RESONANCE IMAGING DEVICE
(FR) DISPOSITIF D'ANTENNE ET DISPOSITIF D'IMAGERIE PAR RÉSONANCE MAGNÉTIQUE
(JA) アンテナ装置及び磁気共鳴検査装置
Abstract
(EN)
With regard to an RF coil of an MRI device, the cost in the manufacturing and maintenance is to be reduced without size limitations.  Provided is an antenna device of the magnetic resonance imaging device provided with a cylindrical-shaped external conductor, a ribbon-shaped conductor linked in the form of a loop and arranged along the cylindrical shape inside the cylindrical-shaped external conductor, and a feed point for performing transmission and/or reception therein.  The antenna device has a sensitivity and generates a magnetic field component perpendicular to the central axis of the cylinder at a desired resonance frequency without using any capacitor and without size limitations in the diameter direction of the cylinder by arranging the ribbon-shaped conductor so that the length thereof can be adjusted at will.
(FR)
La présente invention concerne le fait qu'il convient de réduire le coût de fabrication et d'entretien d'une bobine RF d'un dispositif d'IRM sans en limiter la taille. L'invention porte sur un dispositif d'antenne de dispositif d'imagerie par résonance magnétique pourvu des éléments suivants : un conducteur externe de forme cylindrique ; un conducteur en forme de ruban relié sous la forme d'une boucle et disposé avec la forme cylindrique à l'intérieur du conducteur externe de forme cylindrique ; et un point d'alimentation permettant de réaliser la transmission et/ou la réception à l'intérieur. Le dispositif d'antenne possède une sensibilité, et produit un composant de champ magnétique perpendiculaire à l'axe central du cylindre à une fréquence de résonance désirée. Il ne nécessite pas l'utilisation d'un condensateur ni une limitation de taille dans le sens du diamètre du cylindre, grâce à la disposition du conducteur en forme de ruban de telle sorte que sa longueur puisse être réglée à volonté.
(JA)
MRI装置のRFコイルに関し、サイズの制約無しに、製造、メンテナンス時のコストを低減する。円筒形外部導体と、その内部の円筒形状に沿って配置されるループ状につながったリボン状導体と、その間に送信および/または受信を行う給電点とを備え、リボン状導体を長さを自在に調節可能なように配置することにより、キャパシタを使用することなく、円筒の直径方向のサイズの制約無しに、所望の共振周波数で円筒の中心軸に垂直な磁場成分を発生し、感度を持つ磁気共鳴検査装置のアンテナ装置を提供する。
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