Irradiating coil and magnetic resonance imaging apparatus using the same
AssigneeHitachi Medical Corporation
InventorsYoshiaki Miyauchi, Shizuka Nagai, Atsushi Ohta
Life of this patent
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Abstract
An irradiating coil includes a first ring conductor located on a plane, a second ring conductor having a smaller diameter than a diameter of the first ring conductor and located substantially on the plane of the first ring conductor, a plurality of first line conductors connected the first ring conductor and to the second ring conductor, and an arrangement for making uniform a radio-frequency-pulse that is transmitted by the irradiating coil. The pulse uniforming arrangement includes a diverger which diverges a current flow of the first line conductors.
Claims11
An irradiating coil comprising:
- a first ring conductor located on a plane;
- a second ring conductor having a smaller diameter than a diameter of the first ring conductor and located substantially on the plane of the first ring conductor;
- a plurality of first line conductors connected the first ring conductor and to the second ring conductor;
- and
- means for making uniform a radio-frequency-pulse that is transmitted by the irradiating coil;
- wherein the pulse uniforming means includes diverging means for diverging a current flow of the first line conductors.
An MRI apparatus comprising:
- a static magnetic field generating means for applying a static magnetic field to an object to be examined;
- a gradient magnetic field coil for applying to the object a slicing gradient magnetic field, a readout gradient magnetic field, and an encoding gradient magnetic field;
- an irradiating coil for applying to the object an irradiation pulse for generating magnetic resonance, including a first ring conductor located on a plane, a second ring conductor having a smaller diameter than a diameter of the first ring conductor and located substantially on the plane of the first ring conductor, and a plurality of first line conductors connecting the first ring conductor and the second ring conductor;
- a receiving coil for detecting a magnetic resonance signal;
- and
- image reconstructing means for obtaining an image of the object using the signal detected by the receiving coil;
- wherein the irradiating coil includes means for making the irradiation pulse uniform;
- and
- wherein the pulse uniforming means includes diverging means for diverging a current flow of the first line conductors.
Dependencies are inferred from the claim text.