Tracking system using field mapping
First Claim
1. A method comprising:
- securing multiple sets of current injecting electrodes to one or more stable locations relative to an organ in a patient'"'"'s body;
causing current to flow among the multiple sets of current injecting electrodes to generate a field in the organ;
in response to current flow caused by the multiple sets of current injecting electrodes, measuring the field at each of one or more additional electrodes,determining expected signal measurements of the field inside the organ using a pre-determined model of the field, the pre-determined model of the field correlating field measurements with position coordinates; and
determining a position of each of the one or more additional electrodes in the organ based on the measurements made by the additional electrodes and the determined expected signal measurements of the field.
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0 Petitions
Accused Products
Abstract
In some aspects, a method includes (i) securing multiple sets of current injecting electrodes to an organ in a patient'"'"'s body, (ii) causing current to flow among the multiple sets of current injecting electrodes to generate a field in the organ, (iii) in response to current flow caused by the multiple sets of current injecting electrodes, measuring the field at each of one or more additional electrodes, (iv) determining expected signal measurements of the field inside the organ using a pre-determined model of the field, and (v) determining a position of each of the one or more additional electrodes in the organ based on the measurements made by the additional electrodes and the determined expected signal measurements of the field.
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Citations
41 Claims
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1. A method comprising:
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securing multiple sets of current injecting electrodes to one or more stable locations relative to an organ in a patient'"'"'s body; causing current to flow among the multiple sets of current injecting electrodes to generate a field in the organ; in response to current flow caused by the multiple sets of current injecting electrodes, measuring the field at each of one or more additional electrodes, determining expected signal measurements of the field inside the organ using a pre-determined model of the field, the pre-determined model of the field correlating field measurements with position coordinates; and determining a position of each of the one or more additional electrodes in the organ based on the measurements made by the additional electrodes and the determined expected signal measurements of the field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A system comprising:
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multiple sets of current injecting electrodes configured to be secured to one or more stable locations relative to an organ in a patient'"'"'s body; one or more additional electrodes configured to be positioned within the organ in the patient'"'"'s body; an electronic control system coupled to the multiple sets of current injecting electrodes and the one or more additional electrodes, the electronic control system being configured to; cause current to flow among the multiple sets of current injecting electrodes to generate a field in the organ; in response to current flow caused by the multiple sets of current injecting electrodes, measure the field at each of one or more additional electrodes, a processing system coupled to the electronic system and configured to; determine expected signal measurements of the field inside the organ using a pre-determined model of the field, the pre-determined model of the field correlating field measurements with position coordinates; and determine a position of each of the one or more additional electrodes in the organ based on the measurements made by the additional electrodes and the determined expected signal measurements of the field. - View Dependent Claims (20, 21, 22)
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23. A method comprising:
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securing at least three sets of current injecting electrodes to one or more stable locations relative to an organ in a patient'"'"'s body; causing current to flow among the multiple sets of current injecting electrodes to generate a field in the organ; using a multi-electrode array located on a multi-electrode array catheter in the organ for tracking a position of the multi-electrode array catheter relative to the current injecting electrodes; measuring the field generated by the current injecting electrodes in multiple locations in the organ using the multi-electrode array; modeling the field using the measurements and the positions; determining expected signal measurements of the field at additional locations within the organ based on the model of the field, the model of the field correlating field measurements with position coordinates; and determining a position of one or more additional electrodes in the organ relative to the current injecting electrodes based on measurements made by the additional electrodes and the determined expected signal measurements of the field. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A system comprising:
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at least three sets of current injecting electrodes configured to be secured to an organ in a patient'"'"'s body; a multi-electrode array catheter comprising a multi-electrode array configured to be inserted in the organ for tracking a position of the multi-electrode array catheter relative to the current injecting electrodes; one or more additional electrodes configured to be inserted in the organ; an electronic control system coupled to the at least three sets of current injecting electrodes, to the multi-electrode array catheter, and to the one or more additional electrodes, the electronic control system being configured to; cause current to flow among the multiple sets of current injecting electrodes to generate a field in the organ; measure the field generated by the current injecting electrodes in multiple locations in the organ using the multi-electrode array; a processing system coupled to the electronic system and configured to; model the field using the measurements and the positions; determine expected signal measurements of the field at additional locations within the organ based on the model of the field, the model of the field correlating field measurements with position coordinates; and determine a position of the one or more additional electrodes in the organ relative to the current injecting electrodes based on measurements made by the additional electrodes and the determined expected signal measurements of the field. - View Dependent Claims (39, 40, 41)
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Specification