System for excitation leadless miniature marker
First Claim
1. A system for generating an excitation field for excitation of a leadless marker assembly in or on a body, comprising:
- an energy storage device;
a source coil configured to deliver a magnetic excitation signal waveform to the leadless marker assembly; and
a switching network coupled to the energy storage device and the source coil, wherein the switching network is configured to;
(a) direct electrical current through the source coil;
(b) switch between a first on position and a second on position; and
(c) transfer stored energy from the energy storage device to the source coil and transfer energy from the source coil back to the energy storage device.
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Accused Products
Abstract
A system for generating an excitation field for excitation of a leadless marker assembly. One aspect of the system comprises a source generator assembly having a power supply, an energy storage device, a switching network and a source coil interconnected and configured to deliver a magnetic excitation signal waveform. The power supply is configured to deliver power to energize the energy storage device. The switching network is configured to: direct electrical current through the source coil; alternately switch between a first on position and a second on position; alternately transfer stored energy from the energy storage device to the source coil and to transfer stored energy from the source coil back to the energy storage device; and the source coil being coupled to the switching network to generate an excitation signal.
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Citations
24 Claims
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1. A system for generating an excitation field for excitation of a leadless marker assembly in or on a body, comprising:
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an energy storage device;
a source coil configured to deliver a magnetic excitation signal waveform to the leadless marker assembly; and
a switching network coupled to the energy storage device and the source coil, wherein the switching network is configured to;
(a) direct electrical current through the source coil;
(b) switch between a first on position and a second on position; and
(c) transfer stored energy from the energy storage device to the source coil and transfer energy from the source coil back to the energy storage device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A marker system, comprising:
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a plurality of leadless resonating marker assemblies implantable in or attachable on a body and configured to generate marker resonant signals at one or more selected resonant frequencies;
a plurality of location sensors external to the body and configured to receive the marker signals; and
a source generator assembly having an energy storage device, first and second switching networks coupled to the energy storage device, and first and second source coils, the first switching network and first source coil being interconnected, and the second switching network and the second source coil being interconnected. - View Dependent Claims (12, 13, 14)
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15. A marker locating system, comprising:
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a resonating, leadless marker assembly being excitable by an excitation source signal to generate a marker signal distinguishable from the excitation source signal;
a source signal generating system having an energy storage device, a switching network and a source coil coupled together;
the switching network being configured to;
alternately switch between a first on position and a second on position to generate a magnetic field;
alternately transfer stored energy from the energy storage device to the source coil and from the source coil back to the energy storage device; and
direct electrical current through the source coil to generate a pulsed excitation source signal; and
a plurality of location sensors remote from the marker assembly and being configured to receive the marker signal. - View Dependent Claims (16)
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17. A method of exciting a leadless marker assembly in or on a body, comprising:
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creating a pulsed excitation source signal by directing a current through a source coil, the current being alternated between a first current flow having a continuously increasing electrical current ramp with time, and a second current flow having a continuously decreasing electrical current ramp with time;
exciting a leadless resonating marker assembly with the pulsed excitation source signal;
generating a marker signal from a resonating marker assembly;
detecting the marker signal; and
communicating a location of the leadless marker assembly in three-dimensional space. - View Dependent Claims (18, 19)
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20. A method of energizing a leadless marker assembly in or on a body, comprising:
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(a) storing electrical energy in an energy storage device;
(b) directing the energy from the energy storage device through a switching mechanism to alternately transfer stored energy from the energy storage device to a source coil, and discharge energy from the source coil back to the energy storage device, thereby creating a magnetic field; and
(c) energizing the leadless resonating marker assembly with the magnetic field. - View Dependent Claims (21, 22, 23)
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24. A marker locating system, comprising:
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a resonating, leadless marker being excitable by an excitation source signal to generate a marker signal distinguishable from the source signal, wherein the marker is enclosed and sealed in a discrete encapsulation member and configured to be permanently implantable in a patient;
a source signal generating system having an energy storage device, a switching network coupled to the energy storage device, and a source coil coupled to the switching network, wherein the switching network is configured to direct electrical current through the source coil to generate the excitation source signal; and
a plurality of location sensors remote from the marker, the sensors being configured to receive the marker signal.
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Specification