High-frequency coil device and magnetic resonance imaging apparatus using the same
AssigneeFUJIFILM Corporation
InventorsYosuke Otake, Koichi Arai, Asuka Ikeda
Life of this patent
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Abstract
A high-frequency coil device can maintain a distance between coils at any mounting position in an RF coil including a movable coil unit and can achieve a uniform sensitivity distribution and high sensitivity. A first coil unit configured to move along a substantially circular trajectory and a second coil unit fixed within the substantially circular trajectory are provided, the first coil unit and the second coil unit are disposed at substantially point-symmetric positions, and magnetic coupling between conductor loops provided in both the coil units is maintained substantially constant in a movable range of the first coil unit.
Claims14
A high-frequency coil device for magnetic resonance imaging, comprising:
- a first coil unit having at least one conductor loop;
- a second coil unit having at least one conductor loop;
- and
- a mechanism unit configured to move at least one of the first coil unit and the second coil unit to make a relative position thereof variable,
- the first coil unit and the second coil unit being disposed, respectively, to be physically independent from each other, and one or more conductor loops of each of the first coil unit and the second coil unit being electro-magnetically coupled to each other,
- wherein the mechanism unit is configured to maintain, when at least one of the first coil unit and the second coil unit is moved, electromagnetic coupling between a conductor loop of the first coil unit and an adjacent conductor loop of the second coil unit in at least a part of a movable range.
A magnetic resonance imaging apparatus comprising:
- an RF transmission coil configured to apply a high-frequency magnetic field to a subject under examination;
- and
- an RF reception coil configured to detect a nuclear magnetic resonance signal from the subject under examination,
- wherein at least one of the RF transmission coil or the RF reception coil is a high-frequency coil device comprising:
- a first coil unit having at least one conductor loop;
- a second coil unit having at least one conductor loop;
- and
- a mechanism unit configured to move at least one of the first coil unit and the second coil unit to make a relative position thereof variable,
- the first coil unit and the second coil unit being disposed, respectively, to be physically independent from each other, and one or more conductor loops of each of the first coil unit and the second coil unit being electro-magnetically coupled to each other, and
- wherein the mechanism unit is configured to maintain, when at least one of the first coil unit and the second coil unit is moved, electromagnetic coupling between a conductor loop of the first coil unit and an adjacent conductor loop of the second coil unit in at least a part of a movable range.
Dependencies are inferred from the claim text.