System for excitation of a leadless miniature marker
First Claim
1. A system for generating a pulsed 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 pulsed magnetic excitation signal to the leadless marker assembly, said pulsed magnetic excitation signal being of sufficient strength and of sufficiently limited duration to cause the leadless marker assembly to generate a marker signal that is measurable outside of the body; and
a switching network coupled to the energy storage device and the source coil wherein the switching network is configured to alternately transfer stored energy from the energy storage device to the source coil and to transfer energy from the source coil back to the energy storage device.
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Accused Products
Abstract
A system for generating a pulsed 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 pulsed 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; switch to an off position to prevent energy transfer from the energy storage device to the source coil; 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 a pulsed excitation signal.
268 Citations
27 Claims
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1. A system for generating a pulsed 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 pulsed magnetic excitation signal to the leadless marker assembly, said pulsed magnetic excitation signal being of sufficient strength and of sufficiently limited duration to cause the leadless marker assembly to generate a marker signal that is measurable outside of the body; and
a switching network coupled to the energy storage device and the source coil wherein the switching network is configured to alternately transfer stored energy from the energy storage device to the source coil and to transfer energy from the source coil back to the energy storage device. - 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)
direct electrical current through the source coil to generate a pulsed magnetic excitation field;
alternately switch between a first on position and a second on position to generate the pulsed magnetic field from the source coil;
switch to an off position to prevent energy transfer from the energy storage device to the source coil; and
alternately transfer stored energy from the energy storage device to the source coil and transfer stored energy from the source coil back to the energy storage device.
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22. The system of claim 21 wherein the switching network and the source coil are a first switch network and first source coil that generate a first source signal in a first spatial location, and further comprising a second switch network and a second source coil that generate a second source signal in a second spatial location different than the first spatial location.
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23. The system of claim 22, further including a third switch network and a third source coil that generates a third source signal in a third spatial location different than the first and second spatial location.
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24. A method of energizing a leadless marker assembly, comprising:
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storing electrical energy in an energy storage device;
directing the energy from the energy storage device through a polarity switching mechanism to alternately transfer stored energy from the energy storage device to a source coil and to transfer energy from the source coil back to the energy storage device by alternately switching between first and second on positions;
directing the electrical energy from the switching mechanism through the source coil to generate a magnetic field;
energizing a leadless resonating marker assembly with the magnetic field. - View Dependent Claims (25, 26, 27)
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Specification