Systems and methods for magnetic-resonance-guided interventional procedures
First Claim
Patent Images
1. A probe, comprising:
- a matching circuit;
a first electrode residing on a distal end portion of the probe;
a second electrode residing spaced apart from the first electrode on the distal end portion of the probe;
a first conductor electrically coupled to the first electrode and extending from the matching circuit;
a second conductor electrically coupled to the second electrode and extending from the matching circuit; and
a reactive element disposed between the matching circuit and a distal end of the probe, the reactive element electrically coupling the first conductor and the second conductor, wherein the first and second conductors and the reactive element form a loop antenna for a high frequency signal received by the probe.
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Abstract
Herein is disclosed a probe, including a first electrode disposed at least partially on the probe surface, a second electrode disposed at least partially on the probe surface, a first conductor electrically coupled to the first electrode, a second conductor electrically coupled to the second electrode, and a reactive element electrically coupling the first conductor and the second conductor.
252 Citations
40 Claims
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1. A probe, comprising:
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a matching circuit; a first electrode residing on a distal end portion of the probe; a second electrode residing spaced apart from the first electrode on the distal end portion of the probe; a first conductor electrically coupled to the first electrode and extending from the matching circuit; a second conductor electrically coupled to the second electrode and extending from the matching circuit; and a reactive element disposed between the matching circuit and a distal end of the probe, the reactive element electrically coupling the first conductor and the second conductor, wherein the first and second conductors and the reactive element form a loop antenna for a high frequency signal received by the probe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A magnetic resonance imaging probe, comprising:
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a coaxial cable including an inner conductor and an outer shield; and a split ring electrode including a first portion and a second portion, the first portion being electrically coupled to the inner conductor, and the second portion being electrically coupled to the outer shield. - View Dependent Claims (26, 27)
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28. A magnetic resonance imaging probe, comprising:
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a cable including an inner conductor and an outer shield; at least one electrode electrically coupled to the inner conductor; and at least one electrode electrically coupled to the outer shield; wherein the at least one electrode coupled to the inner conductor and the at least one electrode coupled to the outer shield are electrically coupled by at least one reactive element. - View Dependent Claims (29, 30, 31)
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32. A magnetic resonance imaging probe, comprising:
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a coaxial cable including an inner conductor and an outer shield; a first split ring electrode electrically coupled to the inner conductor; a second split ring electrode electrically coupled to the outer shield; a first center split ring electrode electrically coupled to the first split ring electrode and to a first conductor; and a second center split ring electrode electrically coupled to the first center split ring electrode and to the second split ring electrode, and also coupled to a second conductor.
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33. A magnetic resonance imaging probe, comprising:
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a matching circuit; a first electrode disposed on a probe surface; a second electrode disposed on the probe surface; a first conductor extending from the matching circuit and electrically coupled to the first electrode through a reactance; a second conductor extending from the matching circuit and electrically coupled to the second electrode through a reactance; and a frequency-dependent reactive element disposed between the matching circuit and a distal end of the probe, the reactive element electrically coupling the first conductor and the second conductor such that high-frequency energy received by the probe is conducted between the first conductor and the second conductor through the reactive element to form a loop antenna.
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34. A system for magnetic resonance imaging, comprising:
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a magnetic resonance imaging probe, including; a first electrode disposed on a distal end portion of the probe; a second electrode disposed on the distal end portion of the probe; a first conductor electrically coupled to the first electrode through a reactance; a second conductor electrically coupled to the second electrode through a reactance; and a frequency-dependent reactive element electrically coupling the first conductor and the second conductor, such that high-frequency energy received by the probe is conducted between the first conductor and the second conductor through the reactive element; an interface electrically coupled to the probe, the interface including a tuning/matching/decoupling circuit and a signal splitting circuit; and an MRI scanner electrically coupled to the interface.
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35. A method for imaging and ablating a tissue, comprising:
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exposing the tissue to a magnetic field, the field including a static component and a gradient component; placing a probe adjacent to the tissue, the probe including; a first electrode disposed at least partially on a probe surface; a second electrode disposed at least partially on the probe surface; a first conductor electrically coupled to the first electrode; a second conductor electrically coupled to the second electrode; and a frequency-dependent reactive element electrically coupling the first conductor and the second conductor, such that high-frequency energy is conducted between the first conductor and the second conductor, and a lower frequency ablating energy is conducted to at least one of the first electrode or the second electrode; ablating the tissue by at least one of the first electrode or the second electrode using the lower frequency ablating energy; receiving high frequency energy at the probe using the first conductor, the second conductor, and the reactive element as an antenna; and imaging the tissue using the high-frequency energy received at the probe.
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36. A method for imaging a tissue and measuring a bioelectric potential in the tissue, comprising:
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exposing the tissue to a magnetic field, the field including a static component and a gradient component; placing a probe adjacent to the tissue, the probe having a probe surface and including; a first electrode; a second electrode; a first conductor electrically coupled to the first electrode; a second conductor electrically coupled to the second electrode; and a frequency-dependent reactive element electrically coupling the first conductor and the second conductor, such that high-frequency energy is conducted between the first conductor and the second conductor; measuring a bioelectric potential in the tissue based on low-frequency energy received from the probe, the low frequency energy being conducted from at least one of the first electrode or the second electrode; receiving high frequency energy at the probe using the first conductor, the second conductor, and the reactive element as an antenna; and imaging the tissue using the high-frequency energy.
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37. A method for imaging a tissue, ablating the tissue, and measuring a bioelectric potential in the tissue, comprising:
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exposing the tissue to a magnetic field, the field including a static component and a gradient component; placing a probe adjacent to the tissue, the probe having a probe surface and including; a first electrode; a second electrode; a first conductor electrically coupled to the first electrode; a second conductor electrically coupled to the second electrode; and a frequency-dependent reactive element electrically coupling the first conductor and the second conductor, such that high-frequency energy is conducted between the first conductor and the second conductor, and low-frequency and ablating energy is conducted to at least one of the first electrode or the second electrode; measuring bioelectric potential in the tissue using low-frequency energy received from the probe, the low frequency energy being conducted from at least one of the first electrode or the second electrode; ablating the tissue by directing the ablating energy to the probe, the ablating energy being conducted to the tissue by at least one of the first electrode or the second electrode; receiving high frequency energy at the probe using the first conductor, the second conductor, and the reactive element as an antenna; and imaging the tissue using the high-frequency energy from the probe, the high-frequency energy including magnetic resonance imaging data.
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38. A method for imaging and treating a tissue, comprising:
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exposing the tissue to a magnetic field, the field including a static component and a gradient component; placing a probe adjacent to the tissue, the probe including; a first electrode; a second electrode disposed; a first conductor electrically coupled to the first electrode; a second conductor electrically coupled to the second electrode; and a frequency-dependent reactive element electrically coupling the first conductor and the second conductor, such that high-frequency energy is conducted between the first conductor and the second conductor; delivering a therapy to the tissue using the probe; receiving high frequency energy at the probe using the first conductor, the second conductor, and the reactive element as an antenna; and imaging the tissue using high-frequency energy from the probe, the high-frequency energy having magnetic resonance imaging data. - View Dependent Claims (39, 40)
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Specification