Magnetic resonance apparatus with temperature controlled magnet shim pieces
AssigneesKabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
InventorsKazuto Nakabayashi, Masatoshi Hanawa
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Abstract
A magnetic resonance apparatus in which magnetic metal pieces are accommodated in an accommodation section so as to correct uniformity in a main magnetic field, includes an acquisition unit which acquires temperature information related to at least one of a temperature of the magnetic metal pieces accommodated in the accommodation section, a temperature of the accommodation section, and a temperature of a position in the vicinity of the accommodation section, and a temperature adjustment unit which adjusts the temperature of the magnetic metal pieces to a target temperature by preheating the magnetic metal pieces on the basis of the temperature information acquired by the acquisition unit.
Claims19
A magnetic resonance apparatus in which magnetic metal pieces are located in an accommodation section so as to correct uniformity in a main magnetic field, said apparatus comprising:
- an acquisition unit which acquires temperature information related to at least one of (a) a temperature of the magnetic metal pieces in the accommodation section, (b) a temperature of the accommodation section, and (c) a temperature at a position in the vicinity of the accommodation section;
- and
- a temperature adjustment unit which adjusts the temperature of the magnetic metal pieces to substantially constant a target temperature by heating the magnetic metal pieces on the basis of the temperature information acquired by the acquisition unit.
A magnetic resonance apparatus in which magnetic metal pieces are located in an accommodation section so as to correct uniformity in a main magnetic field, said apparatus comprising:
- an acquisition unit which acquires temperature information related to at least one of (a) a temperature of the magnetic metal pieces accommodated in the accommodation section, (b) a temperature of the accommodation section, and (c) a temperature at a position in the vicinity of the accommodation section;
- and
- a temperature adjustment unit which adjusts the temperature of the magnetic metal pieces to a substantially constant target temperature higher than ambient temperature on the basis of the temperature information acquired by the acquisition unit.
A machine-implemented method for reducing variation in static magnetic field non-uniformity of an MRI system caused by temperature variations in metallic magnet shim pieces, said method comprising use of at least one programmed processor and at least one temperature sensor to:
- sense a temperature using said at least one temperature sensor which represents the temperature of metallic magnet shim pieces in an MRI system;
- and
- automatically control the temperature of said metallic magnet shim pieces to a substantially constant target temperature based on the sensed temperature.
Dependencies are inferred from the claim text.