Implantable marker with wireless signal transmitter
First Claim
1. A wireless marker for localizing a target of a patient, comprising:
- a casing;
a magnetic transponder at least partially encased in the casing, the magnetic transponder producing a wirelessly transmitted magnetic field in response to a wirelessly transmitted excitation energy and having a magnetic centroid; and
an imaging element carried by the casing and/or the magnetic transponder, the imaging element having a radiographic profile in a radiographic image such that the marker has a radiographic centroid at least approximately coincident with the magnetic centroid.
2 Assignments
0 Petitions
Accused Products
Abstract
A wireless marker for localizing a target of a patient comprises a casing and a magnetic transponder at least partially received in the casing. The magnetic transponder produces a wirelessly transmitted magnetic field in response to a wirelessly transmitted excitation energy. The magnetic transponder also has a magnetic centroid. The marker also comprises an imaging element carried by the casing and/or the magnetic transponder. The imaging element has a radiographic profile in a radiographic image such that the marker has a radiographic centroid at least approximately coincident with the magnetic centroid.
159 Citations
45 Claims
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1. A wireless marker for localizing a target of a patient, comprising:
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a casing;
a magnetic transponder at least partially encased in the casing, the magnetic transponder producing a wirelessly transmitted magnetic field in response to a wirelessly transmitted excitation energy and having a magnetic centroid; and
an imaging element carried by the casing and/or the magnetic transponder, the imaging element having a radiographic profile in a radiographic image such that the marker has a radiographic centroid at least approximately coincident with the magnetic centroid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A wireless marker for localizing a target of a patient, comprising:
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a casing;
a magnetic transponder in the casing, the magnetic transponder producing a wirelessly transmitted magnetic field in response to a wirelessly transmitted excitation field, and the magnetic transponder having a first density; and
an imaging element carried by the casing and/or the magnetic transponder, the imaging element having a second density greater than the first density of the magnetic transponder. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A wireless marker for localizing a target of a patient, comprising:
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a casing;
a magnetic transponder at least partially encased in the casing, the magnetic transponder producing a wirelessly transmitted magnetic field in response to a wirelessly transmitted excitation field; and
an imaging element carried by the casing and/or the magnetic transponder, the imaging element being sufficiently absorbent of incident photon fluence of a megavolt photon therapy beam to be visible in a radiographic image generated using such a therapy beam. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A wireless marker for localizing a target of a patient, comprising:
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a casing;
a magnetic transponder at least partially encased in the casing, the magnetic transponder producing a wirelessly transmitted magnetic field in response to a wirelessly transmitted excitation field; and
an imaging element carried by the casing and/or the magnetic transponder, the imaging element having a density of at least 19 g/cm3. - View Dependent Claims (33, 34, 35)
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36. A wireless marker for localizing a target of a patient, comprising:
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a casing;
a magnetic transponder at least partially encased in the casing, the magnetic transponder producing a wirelessly transmitted magnetic field in response to a wirelessly transmitted excitation field; and
an imaging element incorporated with the casing and/or the magnetic transponder, the imaging element producing a radiographic profile in a radiographic image such that the marker has a radiographic centroid at least approximately coincident with the magnetic centroid. - View Dependent Claims (37, 38, 39, 40, 41, 42)
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43. A method of tracking a target of a patient, comprising:
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imaging a marker attached to the patient using a first energy to obtain an image of the marker, the marker having a magnetic transponder that produces a wirelessly transmitted signal in response to a wirelessly transmitted excitation energy; and
locating the marker by transmitting the excitation energy to the marker. - View Dependent Claims (44, 45)
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Specification