Patent ID: 9229078
Filing Date: 2016-01-05
CPC Classification: G01R

Claim Text:
1. A method for reducing mechanical vibrations in a magnetic resonance imaging system, the magnetic resonance imaging system comprising a gradient system having a gradient coil body with a number of gradient coils and an electrically conductive shroud that at least partially encloses the gradient coil body, the method comprising: determining a mechanical natural vibration mode of the gradient coil body in the magnetic resonance imaging system; determining excitation force components for the determined mechanical natural vibration mode; determining electrically conductive areas of the gradient system that, during operation of the magnetic resonance imaging system, generate a Lorentz force component that contributes to the excitation force components, the electrically conductive areas including the gradient coils and the electrically conductive shroud; and modifying the determined electrically conductive areas such that a minimal number of the Lorentz force components coincide with the excitation force components for the determined mechanical natural vibration mode.