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US 2003/0164702 A1Published application
Magnetic resonance apparatus and operating method therefor for actively regulating heating in the apparatus
AssigneeSiemens Aktiengesellschaft
InventorsMario Bechtold, Ralph Kimmlingen, Guenter Ries, Rudolf Roeckelein
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Abstract
In a method for the operation of a magnetic resonance apparatus having a gradient coil system as well as a shim system with a number of shim plates with respectively allocated heaters, at least one information signal indicating a change in shape and/or position of the gradient coil system is determined or employed, the regulation of the heaters, and thus the temperatures of the respective shim plates ensuing dependent thereon.
Claims38
A method for operating a magnetic resonance apparatus comprising the steps of:
- operating a gradient coil system to generate at least one gradient field, said gradient coil system being subject to a change in at least one of shape and position during operation thereof;
- shimming said at least one gradient field with a plurality of ferromagnetic shim plates;
- providing a plurality of heaters respectively in thermally conductive relation with said plurality of shim plates;
- obtaining an information signal during operation of said gradient coil system indicative of said change;
- and
- regulating said heaters during operation of said gradient coil system dependent on said information signal.
3 more elements
A magnetic resonance apparatus comprising:
- a gradient coil system operable to generate at least one gradient field, said gradient coil system being subject to a change in at least one of shape and position during operation thereof;
- a plurality of ferromagnetic shim plates disposed to interact with said at least one gradient field;
- a plurality of heaters respectively in thermally conductive relation with said plurality of shim plates;
- and
- a plurality of regulators respectively allocated to said plurality of heaters, each of said regulators regulating the heater allocated thereto dependent on an information signal indicative of said change.
2 more elements
Dependencies are inferred from the claim text.