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. 28, 2002
Filed:
Jan. 20, 2000
Siemens Aktiengesellschaft, Munich, DE;
Abstract
In a method for the operation of a magnetic resonance apparatus having at least one gradient coil and elements for generating a force acting on the gradient tube, with which natural oscillation modes of the gradient tube are excited, so as to oppose oscillations of the gradient tube produced by Lorentz forces, drive signals are supplied for the excitation of the elements, and the amplitudes and/or the phases of the drive signals are varied for adjusting the force generated by the elements and acting on the gradient tube so as to compensate modifications of the oscillatory behavior of the gradient tube. The drive signals are varied dependent on at least one measured value representing a criterion for the change of the oscillatory behavior.