Reduced field distortion in medical tools
First Claim
Patent Images
1. A system for treatment of a body of a patient, comprising:
- a magnetic position tracking system, comprising;
a first field transducer, which is arranged to generate a magnetic field;
a second field transducer, which is arranged to sense the magnetic field and generate a signal responsively to the sensed field,wherein the second field transducers is coupled to an implant for insertion into the body; and
a control unit, which is arranged to process the signal so as to determine a position of the implant in the body; and
a medical tool for use in the body, the tool comprising a first plurality of layers comprising an electrically conductive material, interleaved with a second plurality of layers comprising an electrically insulating material, wherein the layers are arranged to reduce eddy current distortion in the magnetic field sensed by the second field transducer coupled to the implant.
1 Assignment
0 Petitions
Accused Products
Abstract
A medical tool for operating in a working volume of a magnetic position tracking system includes a first plurality of layers including an electrically conductive material and a second plurality of layers including an electrically insulating material and interleaved with the first plurality. The layers are arranged to reduce eddy current distortion in a magnetic field generated by the magnetic position tracking system.
-
Citations
51 Claims
-
1. A system for treatment of a body of a patient, comprising:
-
a magnetic position tracking system, comprising; a first field transducer, which is arranged to generate a magnetic field; a second field transducer, which is arranged to sense the magnetic field and generate a signal responsively to the sensed field, wherein the second field transducers is coupled to an implant for insertion into the body; and a control unit, which is arranged to process the signal so as to determine a position of the implant in the body; and a medical tool for use in the body, the tool comprising a first plurality of layers comprising an electrically conductive material, interleaved with a second plurality of layers comprising an electrically insulating material, wherein the layers are arranged to reduce eddy current distortion in the magnetic field sensed by the second field transducer coupled to the implant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A system for treatment of a body of a patient, comprising:
-
a magnetic position tracking system, comprising; a first field transducer, which is arranged to generate a magnetic field; a second field transducer, which is arranged to sense the magnetic field and generate a signal responsively to the sensed field, wherein second the field transducers is coupled to an implant for insertion into the body; and a control unit, which is arranged to process the signal so as to determine a position of the implant in the body; and a medical tool for use in the body, the tool comprising a core comprising a ferromagnetic material and an outer coating layer on the core, the coating layer comprising a conductive material configured to produce eddy current distortion responsively to the magnetic field so as to cancel at least part of a distortion caused by the core in the magnetic field sensed by the second field transducer coupled to the implant. - View Dependent Claims (13, 14, 15, 16)
-
-
17. A medical tool for operating in a working volume of a magnetic position tracking system, the tool comprising:
-
a first plurality of layers comprising an electrically conductive material; and a second plurality of layers comprising an electrically insulating material and interleaved with the first plurality, wherein the layers are arranged to reduce eddy current distortion in a magnetic field generated by the magnetic position tracking system. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
-
25. A medical tool for operating in a working volume of a magnetic position tracking system, the tool comprising:
-
a core comprising a ferromagnetic material; and an outer coating layer on the core, the coating layer comprising a conductive material configured to produce eddy current distortion responsively to the magnetic field so as to cancel at least part of a distortion caused by the core in a magnetic field generated by the magnetic position tracking system. - View Dependent Claims (26, 27, 28, 29)
-
-
30. A method for treatment of a body of a patient, comprising:
-
generating a magnetic field using a first field transducer; sensing the magnetic field using a second field transducer, wherein one of the field transducers is coupled to an implant in the body, so as to determine a position of the implant; and treating the body using a medical tool, which comprises a first plurality of layers comprising an electrically conductive material, interleaved with a second plurality of layers comprising an electrically insulating material, wherein the layers are arranged to reduce eddy current distortion in the magnetic field sensed by the second field transducer coupled to the implant. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
-
-
41. A method for treatment of a body of a patient, comprising:
-
generating a magnetic field using a first field transducer; sensing the magnetic field using a second field transducer, wherein the second field transducer is coupled to an implant in the body, so as to determine a position of the implant; and treating the body using a medical tool, which comprises a core comprising a ferromagnetic material and an outer coating layer on the core, the coating layer comprising a conductive material configured to produce eddy current distortion responsively to the magnetic field so as to cancel at least some of a distortion caused by the core in the magnetic field sensed by the second field transducer coupled to the implant. - View Dependent Claims (42, 43, 44, 45)
-
-
46. A method for manufacturing a medical tool for operating in a working volume of a magnetic position tracking system, the method comprising:
-
forming a first plurality of layers comprising an electrically conductive material; and interleaving the first plurality with a second plurality of layers comprising an electrically insulating material, wherein the layers are arranged to reduce eddy current distortion in a magnetic field generated by the magnetic position tracking system. - View Dependent Claims (47, 48, 49)
-
-
50. A method for manufacturing a medical tool for operating in a working volume of a magnetic position tracking system, the method comprising:
-
forming a core of the tool, the core comprising a ferromagnetic material; and coating the core with an outer coating layer, the coating layer comprising a conductive material configured to produce eddy current distortion so as to cancel at least part of a distortion caused by the core when subjecting the tool to a magnetic field in the working volume. - View Dependent Claims (51)
-
Specification