A shim coil arrangement is provided for a magnetic resonance tomography system. The shim coil arrangement includes a printed circuit board, a plurality of spacers, and at least one shim coil. The plurality of spacers are arranged on the printed circuit board. The at least one shim coil is arranged on the printed circuit board.

A shim coil arrangement is provided for a magnetic resonance tomography system. The shim coil arrangement includes a printed circuit board, a plurality of spacers, and at least one shim coil. The plurality of spacers are arranged on the printed circuit board. The at least one shim coil is arranged on the printed circuit board.

The embodiments relate to methods and to magnetic resonance tomography systems having a shim system, where the shim system includes at least one global shim coil in an area surrounding the bore of the magnetic resonance tomography system, and where the shim system includes a local shim coil in a local coil of the magnetic resonance tomography system with a shim controller, where the shim controller embodied to define shim currents for the global shim coil and for the local shim coil.

The embodiments relate to methods and to magnetic resonance tomography systems having a shim system, where the shim system includes at least one global shim coil in an area surrounding the bore of the magnetic resonance tomography system, and where the shim system includes a local shim coil in a local coil of the magnetic resonance tomography system with a shim controller, where the shim controller embodied to define shim currents for the global shim coil and for the local shim coil.

A fat saturation method for a magnetic resonance imaging system having a main magnet providing a magnetic field B.sub.0 The method includes: driving a shim coil assembly with a first set of shimming currents to sufficiently alter a B.sub.0 field inhomogeneity of the magnetic field B.sub.0 within a region that includes a first imaging volume of interest such that water saturation inside the region is reduced from before the first set of shimming currents are applied; applying a fat saturation pulse to the region; identifying the first imaging volume of interest from the region; driving the shim coil assembly with a second set of shimming currents to alter the B.sub.0 field inhomogeneity of the magnetic field B.sub.0 within the first imaging volume of interest such that the B.sub.0 field inhomogeneity within the first imaging volume of interest is reduced; and obtaining magnetic resonance signals from the first imaging volume of interest.

A fat saturation method for a magnetic resonance imaging system having a main magnet providing a magnetic field B.sub.0 The method includes: driving a shim coil assembly with a first set of shimming currents to sufficiently alter a B.sub.0 field inhomogeneity of the magnetic field B.sub.0 within a region that includes a first imaging volume of interest such that water saturation inside the region is reduced from before the first set of shimming currents are applied; applying a fat saturation pulse to the region; identifying the first imaging volume of interest from the region; driving the shim coil assembly with a second set of shimming currents to alter the B.sub.0 field inhomogeneity of the magnetic field B.sub.0 within the first imaging volume of interest such that the B.sub.0 field inhomogeneity within the first imaging volume of interest is reduced; and obtaining magnetic resonance signals from the first imaging volume of interest.

A magnetic resonance apparatus corrects higher order B.sub.0 magnetic field inhomogeneities in the examination volume of an MR device. Currents through two or more coil sections (X.sub.1, X.sub.2) of at least one of a plurality of gradient coils (4) are independently controlled in such a manner that higher order field inhomogeneities of the main magnetic field B.sub.0 are compensated for by the magnetic field of the at least one gradient coil (4).

A magnetic resonance apparatus corrects higher order B.sub.0 magnetic field inhomogeneities in the examination volume of an MR device. Currents through two or more coil sections (X.sub.1, X.sub.2) of at least one of a plurality of gradient coils (4) are independently controlled in such a manner that higher order field inhomogeneities of the main magnetic field B.sub.0 are compensated for by the magnetic field of the at least one gradient coil (4).

A homogenization device for homogenization of a magnetic field with an non-magnetic carrier and compensation elements formed of a magnetic material, the carrier having a carrier wall and the carrier wall surrounding a carrier interior, in the homogenization device located in the magnetic field the magnetic field penetrating into the carrier interior through a first carrier region of the carrier wall and emerging from the carrier interior through a second carrier region of the carrier wall and each of the compensation elements which are located on the carrier contributing to the homogenization of the magnetic field at least in the carrier interior. In the homogenization device, handling during homogenization is improved in that there are recesses in the carrier wall and in each of the recesses at least one of the compensation elements can be directly inserted and removed.

A homogenization device for homogenization of a magnetic field with an non-magnetic carrier and compensation elements formed of a magnetic material, the carrier having a carrier wall and the carrier wall surrounding a carrier interior, in the homogenization device located in the magnetic field the magnetic field penetrating into the carrier interior through a first carrier region of the carrier wall and emerging from the carrier interior through a second carrier region of the carrier wall and each of the compensation elements which are located on the carrier contributing to the homogenization of the magnetic field at least in the carrier interior. In the homogenization device, handling during homogenization is improved in that there are recesses in the carrier wall and in each of the recesses at least one of the compensation elements can be directly inserted and removed.