System and method for improving the distortion tolerance of an electromagnetic tracking system
First Claim
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1. A method of improving a distortion tolerance of an electromagnetic tracking system, the method comprising:
- using a plurality of coil combinations to calculate a plurality of position and orientation values;
using a computing device to analyze the plurality of position and orientation values to determine differences between the plurality of position and orientation values and removing the position and orientation values that are above an acceptable range or that are above a predetermined threshold value; and
using an optimizing technique to change the operating conditions of the electromagnetic tracking system to reduce the differences between the plurality of position and orientation values.
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Abstract
A system and method for improving the tolerability of metal distorters within the electromagnetic field of an electromagnetic tracking system through the use of transmission frequency optimization techniques and/or solution subset measurements.
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Citations
19 Claims
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1. A method of improving a distortion tolerance of an electromagnetic tracking system, the method comprising:
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using a plurality of coil combinations to calculate a plurality of position and orientation values; using a computing device to analyze the plurality of position and orientation values to determine differences between the plurality of position and orientation values and removing the position and orientation values that are above an acceptable range or that are above a predetermined threshold value; and using an optimizing technique to change the operating conditions of the electromagnetic tracking system to reduce the differences between the plurality of position and orientation values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of improving the distortion tolerance of an electromagnetic tracking system, the method comprising:
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using a plurality of different coil combinations to calculate a plurality of position and orientation values; using a computing device to calculate a distortion indicator; comparing the distortion indicator to the differences between the plurality of position and orientation values; and using an optimizing technique to change the operating conditions of the electromagnetic tracking system when the distortion indicator is greater than a predetermined threshold value to reduce the differences between the plurality of position and orientation values.
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10. A method of improving the distortion tolerance of an electromagnetic tracking system, the method comprising:
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using a plurality of different transmitter frequencies and a computing device to determine a set of optimal transmitter frequencies in real-time for use by the electromagnetic tracking system; and using the set of optimal transmitter frequencies to reduce the distortion caused by a distorter within the tracking volume.
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11. A method of improving the distortion tolerance of an electromagnetic tracking system, the method comprising:
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using a plurality of different transmitter frequencies and a computing device to calculate a plurality of position and orientation values; using the computing device to compare permutations of the plurality of position and orientation values to determine differences between the plurality of position and orientation values; and using an optimizing technique to change the operating conditions of the electromagnetic tracking system to reduce the differences between the plurality of position and orientation values. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method of improving the distortion tolerance of an electromagnetic tracking system, the method comprising:
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using a plurality of different coil combinations to calculate a plurality of position and orientation values; using a computing device to analyze the plurality of position and orientation values to determine differences between the plurality of position and orientation values; and removing a particular coil or coils from a coil set to reduce the level of disagreement between the plurality of position and orientation values when there are multiple position and orientation values from the set and a particular coil or coils is used repeatedly in position and orientation values that are above an acceptable range of position and orientation values or above a predetermined threshold value. - View Dependent Claims (19)
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Specification