| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging device which can suppress a magnetostatic magnet from vibration caused by the magnetic field leaked from a gradient magnetic coil. SOLUTION: The apparatus comprises a magnetostatic coils 6 and 7, a magnetostatic magnet including magnetic materials 8a and 8b, a gradient magnetic coils 3, 13a and 13b, wherein the coils 6 and 7 generate a magnetostatic field in a space for monitoring a subject; the gradient magnetic coils 3, 13a and 13b generate a gradient magnetic field in the space 9; and the magnetic materials 8a and 8b are molded to be rings or disks, in the peripheries of which a plurality of slits 22 and 24 are formed to extend along the radii, thereby to reduce eddy currents flowing in the magnetic materials caused by the magnetic fields leaked from the gradient magnetic coils, allowing suppression of vibrations effected by electromagnetic forces generated by the eddy currents and the magnetostatic fields. COPYRIGHT: (C)2007,JPO&INPIT
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