Patent ID: 6580346
Filing Date: 2003-06-17
Classification: G01R

Abstract:
A magnetic resonance imaging apparatus comprising:a pair of magnetic field generating means facing each other vertically across a space wherein a subject lies and generating a magnetic field vertically in a plane perpendicular to a body axis of the subject to form a desired uniform magnetic field space; a pair of cooling means for cooling said magnetic field generating means, said cooling means containing coolant and said magnetic field generating means being arranged within said cooling means; two supporting means arranged vertically in a plane perpendicular to the body axis for supporting said magnetic field generating means, said supporting means thermally connecting said pair of cooling means; each of said magnetic field generating means comprising a group of magnetic field generating devices including a first magnetic field generating device for generating a main component of said uniform magnetic field space vertically in the perpendicular plane, a second magnetic field generating device for reducing a magnetic field generated vertically in a plane perpendicular to said body axis outside said magnetic field generating means and a third magnetic field generating device for improving magnetic homogeneity of said uniform magnetic field, said second magnetic field generating device being arranged outside the first magnetic field generating device relative to a direction of magnetic field for forming the uniform magnetic field space; and an opening provided by said supporting means and said cooling means arranged vertically in a plane perpendicular to the body axis being, in a front view, formed in a long horizontally rectangular shape.