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US 6,664,876 B2Granted
Superconducting magnet and magnetic resonance imaging apparatus using the same
AssigneesHitachi, Ltd., Hitachi Medical Corporation
InventorsHiroyuki Watanabe, Tsutomu Yamamoto, Yoshihide Wadayama, Hirotaka Takeshima, Kenji Sakakibara, Takao Honmei
Life of this patent
Estimating the term…
Abstract
Effect of vibration of a refrigerator on a superconducting coil is reduced to reduce disturbance in an image. A coolant tank for supplying a coolant to coil containers is provided separately from the coil containers, and the refrigerator is placed in the coolant tank, and a coolant circulation passage connects between the coolant tank and the coil containers.
Claims15
A superconducting magnet comprising superconducting coils;
- coil containers, each of said coil container containing a superconducting coil together with coolant;
- and a refrigerator for cooling said coolant, said coil containers being arranged separately from and opposite to each other, a magnetic field space being formed between both of said coil containers, wherein
- a coolant tank for supplying the coolant to said coil containers is provided separately from said coil containers, and said refrigerator is placed in said coolant tank, and a coolant circulation passage connects between said coolant tank and said coil containers.
A superconducting magnet comprising superconducting coils;
- coil containers, each of said coil container containing a superconducting coil together with coolant;
- and a refrigerator for cooling said coolant, said coil containers being arranged separately from and opposite to each other, a magnetic field space being formed between both of said coil containers, wherein
- an annular spatial portion is formed in one surface of said coil container, a ferromagnetic magnetic pole being arranged in the annular spatial portion, a coolant tank for supplying a coolant to said coil container being provided separately from said coil container, said refrigerator being placed in said coolant tank, a coolant circulation passage connecting between said coolant tank and said coil container.
Dependencies are inferred from the claim text.