Patent ID: 8008916

Claim:
A magnetic resonance apparatus comprising: a closed cylindrical basic field magnet that generates a basic magnetic field in an examination volume formed by a bore extending through said basic field magnet, said basic field magnet exhibiting a cylinder axis in the z-direction of an x, y, z Cartesian coordinate system and defining a structural space having a structural space geometry; a cylindrical gradient coil arrangement on a cylinder having a cylinder axis concentric with the cylinder axis of the basic field magnet, said cylindrical gradient coil arrangement comprising an x-gradient coil and a y-gradient coil that are each asymmetrical relative to the z-direction, said cylindrical gradient coil arrangement being configured for fitting in said structural space and the asymmetry of the x-gradient coil and asymmetry of the y-gradient coil relative to the z-direction giving said cylindrical gradient coil arrangement an asymmetrical gradient coil geometry; and a plurality of shim coils that respectively generate magnetic fields in order to homogenize said basic magnetic field in said examination volume, each shim coil in said plurality of shim coils comprising a shim coil conductor and at least some of said shim coils in said plurality of shim coils being asymmetrical relative to the z-direction in order to minimize a coupling inductance between the asymmetrical x-gradient coil and asymmetrical y-gradient coil and the asymmetrical shim coils, and the shim coil conductor of said at least some of said shim coils being configured, dependent on said asymmetrical gradient coil geometry and said structural space geometry, in order to minimize said coupling inductance between the asymmetrical x-gradient coil and the asymmetrical y-gradient coil and said asymmetrical shim coils.