In the magnetic resonance imaging device which possesses the wide tubed gantry of the magnetic resonance imaging device null horizontal magnetostatic field mode which possesses the elliptic tubed gantry

摘要

PPROBLEM TO BE SOLVED: To provide a magnetic resonance imaging apparatus where opening property and access property are improved by expanding the width of the inner diameter of the right/left direction, that is the X direction, of a gantry cover surrounding a measurement space, and which has X-direction gradient magnetic field coils (XGCs) composed of X-direction main and shield gradient magnetic field coils (XGCm and XGCs) arranged so as to cross the X-direction by expanding the width of the inner diameter of the X-direction of the gantry cover, an elliptically cylindrical gantry of a horizontal static magnetic field type where degrading of magnetic field occurrence efficiency is suppressed, and an active shield type gradient magnetic field coil apparatus which suits the gantry. PSOLUTION: In the gradient magnetic field coil apparatus (GC), the respective gradient magnetic field coils are arranged in an order of an X-direction main gradient magnetic field coil (XGCm), a Y-direction main gradient magnetic field coil (YGCm), a Z-direction main gradient magnetic field coil (ZGCm), a Z-direction shield gradient magnetic field coil (ZGCs), a Y-direction shield gradient magnetic field coil (YGCs) and an X-direction shield gradient magnetic field coil (XGCs) from the gantry cover toward an outer peripheral direction. PCOPYRIGHT: (C)2008,JPO&INPIT