| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging apparatus capable of attenuating a vibration without significantly degrading the rigidity of a structure, thereby suppressing the occurrence of noise. SOLUTION: A main coil 9m and a shield coil 9s are mutually arranged at distance of about 50mm-70mm. A sealed bag 24 with powder/particles 25 put therein is arranged between the main coil 9m and the shield coil 9s. When air is discharged from a vacuum chamber 22, the air of the sealed bag 24 is also discharged, so that the powder/particles 25 are compressed. Then, a mold resin is poured into a mold in the chamber 22 and hardened. Accordingly, a gradient magnetic field coil structural body is formed, which includes the compressed powder/particles 25 inside. The compressed powder/particles 25 show a vibration attenuating effect and have the larger rigidity compared with that of the powder before compression. Consequently, the vibration is attenuated so as to suppress the generation of the noise without deteriorating the large rigidity of the structural body. COPYRIGHT: (C)2007,JPO&INPIT
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