Open-type magnetic resonance imaging apparatus

An open-type magnetic resonance imaging apparatus comprising:

• a pair of static magnetic field magnets opposed to each other with respect to an imaging region;
• and
• a pair of gradient magnetic field coils opposed to each other with respect to the imaging region, wherein
• each static magnetic field magnet includes
• a discoid magnetic pole configured to generate a static magnetic field in a Z axis direction in which the pair of static magnetic field magnets are opposed each other, and
• an annular magnetic pole configured to generate a static magnetic field on an X-Y plane perpendicular to the Z axis direction, and
• each gradient magnetic field coil includes
• a Z coil configured to provide a magnetic field being gradient in the Z axis direction in the imaging region,
• a magnetic material block configured to shield the discoid magnetic pole from a magnetic flux generated from the Z coil, and
• a correction coil configured to shield the annular magnetic pole from the magnetic flux generated from the Z coil.