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:
Jun. 27, 2017
Filed:
Aug. 10, 2012
Yukinobu Imamura, Tokyo, JP;
Mitsushi Abe, Tokyo, JP;
Takeshi Yatsuo, Kashiwa, JP;
Masanao Terada, Tokyo, JP;
Ryuya Ando, Tokyo, JP;
Takeshi Kawamura, Tokyo, JP;
Yukinobu Imamura, Tokyo, JP;
Mitsushi Abe, Tokyo, JP;
Takeshi Yatsuo, Kashiwa, JP;
Masanao Terada, Tokyo, JP;
Ryuya Ando, Tokyo, JP;
Takeshi Kawamura, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a gradient magnetic field coil device including: a plurality of main coils generating in an imaging region of a magnetic field resonance imaging device a magnetic field distribution in which an intensity linearly inclines; and a plurality of shield coils, arranged on an opposite side of the imaging region across the main coils, suppressing residual magnetic field generated by the main coils on the opposite side. The plurality of main coils and the plurality of shield coils are connected in series. The device further includes a plurality of current adjusting devices, connected to the shield coils in parallel, independently adjusting currents flowing through the shield coils, respectively, to enhance symmetry of the residual magnetic field. The gradient magnetic field coil device is provided which can suppress generation of eddy current magnetic field even if there is a relative position deviation between the main coils and shield coils.