Superconducting magnet device and magnetic resonance imaging apparatus

A magnetic resonance imaging apparatus comprising:

• a superconducting magnet device that includes a superconducting coil, an insulating load support, a vacuum vessel, and a thermal deformation cancellation mechanism, at least the superconducting coil being housed in the vacuum vessel in a state in which the superconducting coil is supported by the insulating load support, wherein the insulating load support is configured to support the superconducting coil via the thermal deformation cancellation mechanism, the thermal deformation cancellation mechanism being configured to generate a second deformation amount in a direction in which a first deformation amount applied from the superconducting coil to the insulating load support is canceled out due to thermal deformation occurring in the superconducting coil when the inside of the vacuum vessel is cooled to an extremely low temperature, and the thermal deformation cancellation mechanism includes a thermal deformation member that includes at least a material having a second coefficient of thermal expansion determined based on a first coefficient of thermal expansion of a material forming the superconducting coil, and the thermal deformation member being configured to generate the second deformation amount by thermally deforming in the same environment as the superconducting coil;
• a static magnetic field power supply configured to supply power to the superconducting magnet device;
• and
• control circuitry configured to control supply of the power by at least the static magnetic field power supply at the time of generating a magnetic resonance image of a subject imaged in a space of a static magnetic field generated by the superconducting magnet device.