The present invention relates generally to an open superconductive magnet used to generate a uniform magnetic field as part of a magnetic resonance imaging (MRI) diagnostic system, and more particularly to such a magnet having a support structure for a high magnetic field strength.
MRI systems employing superconductive or other type magnets are used in various fields such as medical diagnostics. Open magnets employ two spaced-apart superconductive coil assemblies (or other magnet pole assemblies) with the space between the assemblies allowing for access by medical personnel for surgery or other medical procedures during MRI imaging. The patient may be positioned in that space or also in the bore of annular coil assemblies. The open space helps the patient overcome any feelings of claustrophobia that may be experienced in a closed magnet design. Known open magnet support systems include "C"-shaped supports with the superconductive coil assemblies (or other magnet pole assemblies) being attached to the open top and bottom ends of the "C". Other known support systems include structural posts whose ends are attached to the two superconductive coil assemblies (or other magnet pole assemblies) including attachment to the coil forms (which hold the superconductive coils) of such superconductive coil assemblies. These support systems may be adequate for low field strength magnets, but a more robust support system is desired when the open magnets have a high field strength, including one Tesla or higher, where the attraction forces between the toroidal-shaped superconductive coil assemblies can be in excess of 160,000 pounds.