| 摘要 |
PURPOSE:To prevent the fluctuation of a magnetostatic field and restrain the vibration of a magnet main body due to a phase deviation from a self-shield (iron) even when a superconducting magnet main body (magnetostatic field) is vibrated by a vibration of a gradient magnetic field coil or a helium freezer at the time of measurement of a subject by an MR imaging apparatus. CONSTITUTION:A plurality of fixed bolts 11 are arranged at any places of a self-shield 4 to clamp and integratedly fix the self-shield 4 and a superconducting magnet main body 2 and each of the fixed bolts 11 is completely fixed by a locking nut 12 so that the superconducting magnet main body is directly and rigidly fixed to the self-shield 4 and is also locked and integratedly supported. Thus, a vibration of the superconducting magnet 2 is restrained and the superconducting magnet operates with the self-shield integratedly and synchronously so as to eliminate a phase deviation with the self-shield 4 due to such a vibration. |
