Method and system for calibration of a marker localization sensing array
First Claim
1. A method for calibrating a sensing array used for marker localization, the sensing array including a plurality of sensing elements, the method comprising:
- applying an excitation to at least one of said plurality of sensing elements of said sensing array used for marker localization;
analyzing the output of some or all of said plurality of sensing elements resulting from said excitation;
repeating said excitation and analyzing process for each of said plurality of sensing elements;
determining corrections to a sensed signal based upon said analyzed outputs of said plurality of sensing elements.
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Abstract
A method and system for calibrating a sensing array used in marker localization. The sensing array is for sensing a signal produced by a marker is implanted in an object, such as a human body. The signal generated by the marker is a magnetic field. The sensing array has a plurality of sensing coils and associated amplification circuitry. The method comprises applying an excitation to each of the sensing elements and analyzing the output of the plurality of sensing elements resulting from the excitation. A correction matrix based upon the analyzed outputs of the plurality of sensing elements is determined.
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Citations
49 Claims
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1. A method for calibrating a sensing array used for marker localization, the sensing array including a plurality of sensing elements, the method comprising:
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applying an excitation to at least one of said plurality of sensing elements of said sensing array used for marker localization;
analyzing the output of some or all of said plurality of sensing elements resulting from said excitation;
repeating said excitation and analyzing process for each of said plurality of sensing elements;
determining corrections to a sensed signal based upon said analyzed outputs of said plurality of sensing elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 18, 19, 20)
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12. A method for calibrating a sensing array used for marker localization, the sensing array including a plurality of sensing elements, said plurality of sensing elements including a calibration subset selected from said plurality of sensing elements, comprising:
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applying an excitation to one of said plurality of sensing elements in said calibration subset of said sensing array used for marker localization;
analyzing the output of some or all of said plurality of sensing elements resulting from said excitation;
repeating said excitation and analyzing process for each of the sensing elements in said calibration subset; and
determining corrections to a sensed signal based upon said analyzed outputs. - View Dependent Claims (13, 14, 15, 16, 17)
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21. A method for calibrating a sensing array used for marker localization, the sensing array including a plurality of sensing elements, said plurality of sensing elements including a calibration subset selected from said plurality of sensing elements, comprising:
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applying a voltage excitation to one of said plurality of sensing elements in said calibration subset of said sensing array used for marker localization;
analyzing the output of some or all of said plurality of sensing elements resulting from said excitation;
repeating said voltage excitation and analyzing process for each of the sensing elements in said calibration subset; and
determining corrections to a sensed signal based upon said analyzed outputs. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A apparatus for calibrating a sensing array used for marker localization, the sensing array including a plurality of sensing elements, said plurality of sensing elements including a calibration subset selected from said plurality of sensing elements, comprising:
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a source for applying an excitation to one of said plurality of sensing elements in said calibration subset of said sensing array used for marker localization;
means for analyzing the output of some or all of said plurality of sensing elements resulting from said excitation;
means for repeating said excitation and analyzing process for each of the sensing elements in said calibration subset; and
means for determining corrections to a sensed signal based upon said analyzed outputs. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37)
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38. A method for calibrating multiple sensing arrays, each sensing array used for marker localization, the sensing array including a plurality of sensing elements, said plurality of sensing elements including a calibration subset selected from said plurality of sensing elements, comprising:
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for one of said sensing arrays;
(a) applying an excitation to one of said plurality of sensing elements in said calibration subset of said sensing array used for marker localization;
(b) analyzing the output of some or all of said plurality of sensing elements resulting from said excitation;
(c) repeating said excitation and analyzing process for each of the sensing elements in said calibration subset; and
(d) determining noise corrections based upon said analyzed outputs; and
using said noise corrections determined for said one of said sensing arrays in the other sensing arrays. - View Dependent Claims (39, 40, 41)
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42. A method for calibrating a sensing array used for marker localization, the sensing array including a plurality of sensing elements, said plurality of sensing elements including a calibration subset selected from said plurality of sensing elements, comprising:
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applying a current excitation to one of said plurality of sensing elements in said calibration subset of said sensing array used for marker localization;
analyzing the output of some or all of said plurality of sensing elements resulting from said excitation;
repeating said current excitation and analyzing process for each of the sensing elements in said calibration subset; and
determining corrections to a sensed signal based upon said analyzed outputs. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49)
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Specification