Patent ID: 8838193

Claim:
A magnetic module for use as a module in a magnetic resonance system comprising a modular array arranged such that a combined field being of sufficient uniformity to enable a magnetic resonance procedure to be performed is created in a working volume comprising: a primary magnetic field source and a secondary magnetic field source each comprising a support structure upon which is defined a conducting surface path of superconductor material; wherein said primary and secondary sources are adapted such that the respective conducting surface paths are operable to be independently energized with electric current to provide a primary and a secondary magnetic field respectively; the primary and secondary magnetic field sources are arranged such that the primary magnetic field provided by the primary source can be adapted by adjusting the secondary magnetic field provided by independently energising the secondary source and wherein the primary and secondary magnetic field sources are arranged such that the secondary magnetic field source is operable to modify the absolute field strength of the primary magnetic field when independently energised with electric current; and wherein the support structure comprises an at least partially radially overlapping layer of the super conductor material arranged in a spiral wherein the conducting surface path of super conductor material is arranged on the surface of the support structure such that the conducting path has a first point for the introduction of current and a second point for the extraction of current.