Patent · US Expired

Method of cancelling lorentz force-produced oscillations in a gradient tube, and magnetic resonance imaging apparatus operating according to the method

US6396272B1 · kind B1 · utility

8Cited by

4References

26Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Peter Dietz · Bad Mergentheim, DE
Winfried Arz · Koblenzer Straße, DE
Rudolf Roeckelein · Erlangen, DE

Key dates

Filing date	Jan 20, 2000
Grant date	May 28, 2002
Priority date	—
Expiry date	Jan 20, 2020

Classification

Technology area (CPC G)Physics
CPC primaryG01R33/3854
WIPO fieldMeasurement
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.