Shimming device for a magnetic resonance imaging apparatus with enhanced cooling and method for providing such a device

摘要

A device to shim the magnetic field of an MRI apparatus comprises a retaining element mounted on an outer vacuum chamber bore (OVCB) tube 1 of the MRI apparatus. In the space 6 between the retaining element 2 and the OVCB tube at least one shim assembly 7 and at least one hose element/cooling tube 8, which can be filled with cooling fluid, are arranged. The retaining element may be a U-shaped clamp and may be welded to the OVCB tube. The hose element may be flat when unfilled, made of PVC and when filled with cooling fluid is pressed to the shim assembly and the retaining element. The shim assembly may be arranged between the retaining element and the hose element (fig 2). The shim assembly may be a single shim element or a shim tray containing several elements.