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US 2004/0169515 A1Published application
Superconductive magnet apparatus and magnetic resonance imaging apparatus
AssigneesHitachi, Ltd., Hitachi Medical Corporation
InventorsYasunori Koga, Hiroyuki Watanabe
Life of this patent
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Abstract
A cryostat is formed into a donut form, where a cylindrical or a square concave is formed in the center of the cryostat of the superconductive magnet apparatus for an open type MRI apparatus, and the cryo-compressor is disposed in the concave.
Claims10
A superconductive magnet apparatus, which comprises:
- a cryostat comprising a pair of ring shaped superconductive coils;
- a pair of coil containers each including each of the superconductive coils and for accommodating a cooling medium;
- a pair of thermal shields each covering each of the coil containers;
- and a pair of vacuum vessels covering each of the thermal shields, and a cryo-compressor for cooling the cooling medium, wherein the coil containers are disposed so as to face each other, and a magnetic field space is formed in a bore or space between the coil containers, the cryo-compressor being disposed inside of the superconductive coils and in a concave formed in the center of the cryostat.
1 more element
A superconductive magnet apparatus, which comprises:
- a cryostat comprising a pair of superconductors;
- a pair of coil containers for accommodating each of the superconductive coils and a cooling medium;
- a pair of thermal shields for covering the coil containers with a space;
- and a cryo-compressor for cooling the cooling medium, wherein the coil containers are so disposed as to face each other, and a magnetic space is formed between the coil containers, the cryo-compressor being disposed at a position where the experience magnetic strength is weak.
1 more element
A superconductive magnet apparatus, which comprises:
- a cryostat comprising a pair of superconductive coils;
- a pair of coil containers each accommodating each of the coils and a cooling medium;
- a pair of thermal shields each covering each of the coil containers with a space;
- and a vacuum vessel for covering the coil containers and the thermal shield, the vacuum vessel being kept vacuum;
- and a cryo-compressor for cooling the cooling medium, wherein the coil containers are so disposed as to face each other to form a magnetic space between the coil containers, characterized in that there is disposed a shield coils for shielding the magnetic field of the superconductive coils, and the cryo-compressor is disposed near the shield coils.
2 more elements
Dependencies are inferred from the claim text.