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:
Dec. 24, 2002
Filed:
Nov. 13, 2001
Hirotaka Takeshima, Ryugasaki, JP;
Yoshihide Wadayama, Hitachiohta, JP;
Hitachi Medical Corporation, Tokyo, JP;
Abstract
A magnetic resonance imaging apparatus is provided with a pair of static magnetic field uniformity controlling members A and B which are disposed adjacent to respective pair of magnetic plates A and B and of which cross sections configured so as to further enhance static magnetic field uniformity in static magnetic field region and a pair of flat plate shaped eddy current suppressing members A and B which are disposed adjacent to respective pair of gradient magnetic field coils A and B and shield influences of gradient magnetic field generated by the gradient magnetic field coils A and B on the static magnetic field uniformity controlling members A and B of pole pieces. The eddy current suppressing members A and B are easily manufactured from a flat plate member simply by cutting the same while following the shape of the gradient magnetic field coils A and B. Further, with the provision of the eddy current suppressing members A and B influences due to eddy current and residual magnetism induced by the gradient magnetic field coils A and B on the static magnetic field uniformity controlling members A and B are suppressed and uniformity in the uniform static magnetic field region is enhanced.