Magnetic resonance antenna
First Claim
1. A magnetic resonance antenna having a longitudinal axis, comprising:
- a birdcage structure having a longitudinal axis and having an eigen-resonance frequency, said birdcage structure comprising a plurality of parallel, longitudinal antenna rods, each having opposite ends, and antenna ferrules respectively at said opposite ends of said longitudinal antenna rods connected to said longitudinal antenna rods in terms of radio-frequency;
a plurality of radio-frequency switching elements respectively connected to said antenna rods for, when switched, interrupting the respective antenna rods in terms of radio-frequency for detuning said eigen-resonance frequency with respect to an operating magnetic resonance frequency; and
two switching lines connected in common to said radio-frequency switching elements from an exterior of said birdcage structure, each switching line comprising a ring line disposed annularly with respect to said birdcage structure and transversely to said longitudinal antenna rod.
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Accused Products
Abstract
A magnetic resonance antenna has longitudinal antenna rods in a birdcage structure, and antenna ferrules connecting the longitudinal antenna rods at their ends in terms of radio-frequency. The magnetic resonance antenna has a number of radio-frequency switching elements that interrupt, in terms of radio-frequency, at least one part of the longitudinal antenna rod to detune the eigen-resonance frequency of the antenna with respect to an operating magnetic resonance frequency. For this purpose, the magnetic resonance antenna is provided with two switching lines, directed to the radio-frequency switching elements from outside of the birdcage structure, the switching lines having a ring line connected thereto running annularly on or in the birdcage structure and transverse to the longitudinal antenna rods.
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Citations
24 Claims
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1. A magnetic resonance antenna having a longitudinal axis, comprising:
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a birdcage structure having a longitudinal axis and having an eigen-resonance frequency, said birdcage structure comprising a plurality of parallel, longitudinal antenna rods, each having opposite ends, and antenna ferrules respectively at said opposite ends of said longitudinal antenna rods connected to said longitudinal antenna rods in terms of radio-frequency; a plurality of radio-frequency switching elements respectively connected to said antenna rods for, when switched, interrupting the respective antenna rods in terms of radio-frequency for detuning said eigen-resonance frequency with respect to an operating magnetic resonance frequency; and two switching lines connected in common to said radio-frequency switching elements from an exterior of said birdcage structure, each switching line comprising a ring line disposed annularly with respect to said birdcage structure and transversely to said longitudinal antenna rod. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for detuning an eigen-resonance frequency of a magnetic resonance antenna having a birdcage structure with a longitudinal axis formed by a plurality of parallel, longitudinal antenna rods and antenna ferrules respectively connected at opposite ends of said antenna rods in terms of radio-frequency comprising the steps of:
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interrupting at least one part of each of said longitudinal antenna rods in terms of radio-frequency with a radio-frequency switching elements; switching the respective radio-frequency switching elements in common via two switching lines connected to the respective radio-frequency switching elements from an exterior of the birdcage structure; and forming each of said switching lines with a ring line proceeding annularly relative to said birdcage structure and transversely to said longitudinal antenna rods. - View Dependent Claims (24)
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Specification