The present invention relates to a magnetic resonance imaging (MRI)
system. The basic components of a MRI system are the main magnet system,
the gradient system, the RF system and the signal processing system. The
gradient system comprises normally three orthogonal primary coils and
three orthogonal shield coils. The shield coils of the gradient system
are usually designed to minimize the generation of eddy currents within
the main magnet system. However, such a gradient system designed to
minimize the generation of eddy currents is not optimal with respect to
mechanical vibrations inside the gradient system. It is also possible to
design the shield coils of the gradient system in a way to minimize
mechanical vibrations inside the gradient system. However, such a
gradient system is not optimal with respect to the minimization of eddy
currents. The present invention provides a magnetic resonance imaging
system, comprising at least: a main magnet system; a gradient system,
said gradient system comprising primary coil-like elements and shield
coil-like elements, said shield coil-like elements being designed to
provide Lorentz force compensation for the primary coil-like elements
thereby minimizing, preferably eliminating, mechanical vibrations inside
the gradient system; and an eddy current shield system positioned between
said main magnet system and said gradient system, said eddy current
shield system being mechanically decoupled from the main magnet system
and/or the gradient system.