Detection of metal disturbance in a magnetic tracking system
US7321228B2 · kind B2 · utility
171Cited by
103References
22Claims
0Family size
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Key dates
| Filing date | Jul 31, 2003 |
| Grant date | Jan 22, 2008 |
| Priority date | — |
| Expiry date | Nov 9, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2034/2051
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for tracking an object includes producing energy fields at a plurality of different frequencies in a vicinity of the object, and receiving signals that are generated at a location of the object at the different frequencies in response to the energy fields. Multiple computations are made of spatial coordinates of the object based on the signals received at the different frequencies. Convergence of the computations is tested in order to ascertain whether the energy fields have been perturbed by an article in the vicinity of the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.