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:
May. 13, 2008
Filed:
Jan. 29, 2004
Cornelis Leonardus Gerardus Ham, Eindhoven, NL;
Wilhelmus Reinerius Maria Mens, Eindhoven, NL;
Johannes Petrus Groen, Eindhoven, NL;
Cornelis Leonardus Gerardus Ham, Eindhoven, NL;
Wilhelmus Reinerius Maria Mens, Eindhoven, NL;
Johannes Petrus Groen, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A magnetic resonance imaging (MRI) system includes an examination volume (), a main magnet system () for generating a main magnetic field (B) in the examination volume, a gradient magnet system () for generating gradients of the main magnetic field, and a control system () for compensating disturbances of the magnetic field caused by mechanical vibrations of the MRI system. The control system is a feed-forward control system which determines a necessary compensation for said disturbances in dependence on an electric current in the gradient magnet system according to a predetermined response relation. Since in most MRI systems the mechanical vibrations are predominantly caused by the altering electric currents in the gradient magnet system and by eddy currents induced thereby, an accurate and reliable compensation for said disturbances is provided, so that artifacts and other distortions of the reconstructed image caused by said disturbances are considerably reduced.