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US 2003/0110564 A1Published application
Magnetic resonance imaging apparatus
AssigneeHitachi Medical Corporation
InventorsHitoshi Yoshino, Tsuneo Maeda
Life of this patent
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Abstract
A magnetic resonance imaging apparatus configured using a single column for supporting magnet devices disposed above and below the apparatus, wherein peripheries of yokes covering the magnet devices are formed to be arcs, thereby improving openness and accessibility of an operator to an object under examination.
Claims16
A magnetic resonance imaging apparatus comprising:
- permanent magnets disposed in opposition to each other with respect to a space sufficient to accommodate an object under examination formed therebetween, for generating a static magnetic field in an opposite direction;
- pole pieces disposed on sides of the permanent magnets facing the space, for improving uniformity;
- yokes disposed outside the permanent magnets to be opposed each other with respect to the space;
- and
- a column for magnetically connecting the yokes;
- wherein the column comprises a single member, wherein peripheries of the permanent magnets and the pole pieces are formed to be circular or generally circular, and
- wherein the yokes comprise main body portions for mounting the permanent magnets thereto and protrusions joined to the column, and peripheries of the main body portions are formed to be arcs or like arcs so as to be aligned with the permanent magnets and the pole pieces.
4 more elements
A magnetic resonance imaging apparatus comprising:
- superconductive magnets disposed in opposition to each other with respect to a space sufficient to accommodate an object under examination formed therebetween, for generating a static magnetic field in an opposite direction;
- cryostats disposed in opposition to each other for surrounding the superconductive magnets, thereby cooling the superconductive magnets to a superconductive state and keeping the superconductive magnets in the superconductive state;
- a connecting tube for connecting and supporting the cryostats;
- first ferromagnetic member disposed outside the cryostats to be opposed each other with respect to the space;
- and
- a second ferromagnetic member for magnetically connecting and supporting the first ferromagnetic member;
- wherein the connecting tube and the second ferromagnetic member respectively comprises a single member.
4 more elements
A magnetic resonance imaging apparatus comprising:
- a pair of magnet devices vertically disposed, in opposition to each other with respect to a static magnetic field space formed therebetween for accommodating an object under examination, the pair of magnet devices having a circular outer shape;
- a single support structure member coupled to one end portion of the magnet devices, for supporting the magnet devices;
- and
- a bed being rotated along outer side of the magnet devices in a horizontal direction with respect to a center of the static magnetic field space.
1 more element
A magnetic resonance imaging apparatus comprising:
- a pair of magnet devices vertically disposed in opposition to each other, for forming a static magnetic field space therebetween;
- a single support structure member coupled to one ends of the magnet devices, for supporting the pair of magnet devices;
- and
- a bed for carrying and transferring the object under examination to a center of the static magnetic field space;
- wherein the bed is positioned so that the object under examination is transferred in a direction other than a direction of an extended line connecting the center of the static magnetic field space and a center of the single support structure member.
2 more elements
A magnetic resonance imaging apparatus comprising:
- a pair of magnet devices vertically disposed in opposition to each other for forming a static magnetic field space therebetween;
- a single support structure member coupled to one ends of the pair of magnet devices, for supporting the pair of magnet devices;
- and
- a bed for carrying and transferring the object under examination lying down thereon to a center of the static magnetic field space;
- wherein the bed is positioned so that an angle formed between a line connecting the center of the static magnetic field space and a center of the single support structure member and a line connecting the center of the static magnetic field space and a center of the bed is in the ranges from 45 to 135 degrees or from 225 to 315 degrees.
2 more elements
Dependencies are inferred from the claim text.