Radio frequency coil assembly and magnetic resonance imaging apparatus
First Claim
1. A radio frequency coil assembly for receiving a radio frequency magnetic resonance signal generated in a tested person based on a gradient magnetic field pulse and a radio frequency magnetic field pulse applied to the tested person under a static magnetic field according to a predetermined sequence, the radio frequency coil assembly comprising:
- a plurality of first radio frequency coils which are arranged to be adjacent to each other in a first direction; and
a second radio frequency coil which is structurally decoupled from the first radio frequency coilswherein at least one of said coils has a shape different from another one of said coils to increase local sensitivity,wherein the second radio frequency coil is disposed in the first direction to cover an image-picked-up region substantially equivalent to the image-picked-up region which is covered by the first radio frequency coils, andwherein the second radio frequency coil is a single cross coil which is shaped to cross at least N times in the first direction, and wherein N is a number of the first radio frequency coils.
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Accused Products
Abstract
A radio frequency coil assembly is provided. The radio frequency coil assembly includes: a first radio frequency coil for receiving a magnetic resonance signal from a tested body; a second radio frequency coil for receiving a magnetic resonance signal from the tested body; and a third radio frequency coil for receiving a magnetic resonance signal from the tested body and having a shape which is different from that of at least one of the first and second radio frequency coils so as to increase a local sensitivity in an image-picked-up region.
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Citations
31 Claims
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1. A radio frequency coil assembly for receiving a radio frequency magnetic resonance signal generated in a tested person based on a gradient magnetic field pulse and a radio frequency magnetic field pulse applied to the tested person under a static magnetic field according to a predetermined sequence, the radio frequency coil assembly comprising:
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a plurality of first radio frequency coils which are arranged to be adjacent to each other in a first direction; and a second radio frequency coil which is structurally decoupled from the first radio frequency coils wherein at least one of said coils has a shape different from another one of said coils to increase local sensitivity, wherein the second radio frequency coil is disposed in the first direction to cover an image-picked-up region substantially equivalent to the image-picked-up region which is covered by the first radio frequency coils, and wherein the second radio frequency coil is a single cross coil which is shaped to cross at least N times in the first direction, and wherein N is a number of the first radio frequency coils.
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2. A radio frequency coil assembly for receiving a radio frequency magnetic resonance signal generated in a tested person based on a gradient magnetic field pulse and a radio frequency magnetic field pulse applied to the tested person under a static magnetic field according to a predetermined sequence, the radio frequency coil assembly comprising:
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a plurality of first radio frequency coils which are arranged to be adjacent to each other in a first direction; and a second radio frequency coil which is structurally decoupled from the first radio frequency coils, wherein at least one of said coils has a shape different from another one of said coils to increase local sensitivity, wherein the second radio frequency coil is disposed in the first direction to cover an image-picked-up region substantially equivalent to the image-picked-up region which is covered by the first radio frequency coils, and wherein the first radio frequency coils are loop coils which are disposed in the first direction to be magnetically decoupled to each other, and wherein the second radio frequency coil is a single cross coil which is shaped to cross at least N times in the first direction, and wherein N is a number of the first radio frequency coils. - View Dependent Claims (3, 4)
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5. A radio frequency coil assembly having upper and lower coil assemblies disposed to face each other with a tested person interposed therebetween under a static magnetic field and allowing the upper and lower coil assemblies to receive a radio frequency magnetic resonance signal generated in the tested person based on a gradient magnetic field pulse and a radio frequency magnetic field pulse applied to the tested person according to a predetermined sequence, wherein the lower coil assembly at least comprises:
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a plurality of first radio frequency coils which are arranged to be adjacent to each other in a first direction; a second radio frequency coil which is structurally decoupled from the first radio frequency coils; wherein at least one of said coils has a shape different from another one of said coils to increase local sensitivity; and wherein the second radio frequency coil is a single cross coil which is shaped to cross at least N times in the first direction, and wherein N is a number of the first radio frequency coils.
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6. A radio frequency coil assembly having upper and lower coil assemblies disposed to face each other with a tested person interposed therebetween under a static magnetic field and allowing the upper and lower coil assemblies to receive a radio frequency magnetic resonance signal generated in the tested person based on a gradient magnetic field pulse and a radio frequency magnetic field pulse applied to the tested person according to a predetermined sequence, wherein the upper coil assembly at least comprises:
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a plurality of first radio frequency coils which are arranged to be adjacent to each other in a first direction; and a second radio frequency coil which is structurally decoupled from the first radio frequency coils; wherein at least one of said coils has a shape different from another one of said coils to increase local sensitivity; and wherein the second radio frequency coil is a single cross coil which is shaped to cross at least N times in the first direction, and wherein N is a number of the first radio frequency coils.
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7. A radio frequency coil assembly receiving a radio frequency magnetic resonance signal generated in a tested person based on a gradient magnetic field pulse and a radio frequency magnetic field pulse applied to the tested person under a static magnetic field, the radio frequency coil assembly comprising:
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a plurality of loop coils which are arranged to be adjacent to each other in a predetermined direction; and a cross coil which is disposed to overlap with at least one of the loop coils and shaped to cross at crossing times which are equal to or more than the number of loop coils wherein at least one of said coils has a shape different from another one of said coils to increase local sensitivity.
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8. A radio frequency coil assembly receiving a radio frequency magnetic resonance signal generated in a tested person based on a gradient magnetic field pulse and a radio frequency magnetic field pulse applied to the tested person under a static magnetic field, the radio frequency coil assembly comprising:
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a plurality of loop coils which are arranged to be adjacent to each other in a predetermined direction; and a cross coil which is disposed to overlap with at least one of the loop coils and shaped to cross three times or more wherein at least one of said coils has a shape different from another one of said coils to increase local sensitivity. - View Dependent Claims (9)
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10. A radio frequency coil assembly comprising:
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two inner loop coils; and two outer loop coils which are arranged to interpose the two inner loop coils, wherein each of the two inner loop coils has a width with respect to an array direction of at least four loop coils including the two inner loop coils and the two outer loop coils and an area of a loop plane which are smaller than those of the two outer loop coils wherein at least one of said coils has a shape different from another one of said coils to increase local sensitivity. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A radio frequency coil assembly comprising:
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two inner loop coils; and two outer loop coils which are arranged to interpose the two inner loop coils, wherein each of the two inner loop coils has a width with respect to an array direction of at least four loop coils including the two inner loop coils and the two outer loop coils which is smaller than that of the two outer loop coils wherein at least one of said coils has a shape different from another one of said coils to increase local sensitivity. - View Dependent Claims (23, 24, 25, 26)
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27. A radio frequency coil assembly comprising:
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a first loop coil; and a second loop coil which is disposed to be adjacent to the first loop coil, wherein the one of the first and second loop coils has a width with respect to an array direction of the first and second loop coils and an area of a loop plane which are smaller than those of the other wherein at least one of said coils has a shape different from another one of said coils to increase local sensitivity. - View Dependent Claims (28, 29, 30, 31)
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Specification