Systems and methods for common mode traps in MRI systems
First Claim
1. A common mode trap for a magnetic resonance imaging (MRI) apparatus, comprising:
- a first conductor and a second conductor counterwound around a length of a central conductor, wherein the first and the second conductors are radially spaced a first distance from the central conductor, wherein the first and second conductors are fixed to a first side of the central conductor; and
a third conductor and a fourth conductor counterwound around the length of the central conductor, wherein the third and fourth conductors are radially spaced the first distance from the central conductor, and wherein the third and fourth conductors are fixed to a second side of the central conductor opposite the first side.
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Accused Products
Abstract
Various methods and systems are provided for a common mode trap for a magnetic resonance imaging (MRI) apparatus. In one embodiment, a common mode trap comprises: a first conductor and a second conductor counterwound around a length of a central conductor, the first and the second conductors radially spaced a distance from the central conductor, the first and second conductors fixed to a first side of the central conductor; and a third conductor and a fourth conductor counterwound around the length of the central conductor, the third and fourth conductors are radially spaced the distance from the central conductor, the third and fourth conductors fixed to a second side of the central conductor opposite the first side. In this way, the density of common mode trap conductors in a common mode trap may be increased, thereby increasing the mutual inductance between the common mode trap and the central conductor.
31 Citations
20 Claims
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1. A common mode trap for a magnetic resonance imaging (MRI) apparatus, comprising:
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a first conductor and a second conductor counterwound around a length of a central conductor, wherein the first and the second conductors are radially spaced a first distance from the central conductor, wherein the first and second conductors are fixed to a first side of the central conductor; and a third conductor and a fourth conductor counterwound around the length of the central conductor, wherein the third and fourth conductors are radially spaced the first distance from the central conductor, and wherein the third and fourth conductors are fixed to a second side of the central conductor opposite the first side. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A common mode trap assembly for a magnetic resonance imaging (MRI) system, comprising:
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a central conductor with a length and configured to transmit a signal between an MRI radio frequency coil and a processing element of the MRI system; and a plurality of common mode traps extending along at least a portion of the length of the central conductor, the common mode traps configured to provide an impedance to reduce transmitter-driven currents of the MRI system, wherein each of the common mode traps comprises a second length and includes a plurality of conductor pairs, each conductor pair of the plurality of conductor pairs comprising a first conductor and a second conductor counterwound around the central conductor. - View Dependent Claims (11, 12, 13, 14)
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15. A method for providing a transmission cable for a radio frequency (RF) coil of a magnetic resonance imaging (MRI) system, comprising:
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providing a central conductor of a length and configured to transmit a signal between the RF coil and a processing element of the MRI system; and positioning a plurality of common mode trap conductor pairs around the central conductor along at least a portion of the length of the central conductor, wherein the plurality of common mode trap conductor pairs are distributed symmetrically about the central conductor, wherein each common mode trap conductor pair includes a first common mode trap conductor wrapped in a spiral in a first direction about the central conductor along the portion of the length of the central conductor, and a second common mode trap conductor wrapped in a spiral in a second direction opposite to the first direction about the central conductor along the portion of the length. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification