Method and system for navigating a catheter probe in the presence of field-influencing objects
US6493573B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 8, 2000 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Jun 8, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/0481
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system for and method of determining and compensating for the effect of a field influencing object on a field sensor, preferably a coil, that is within a navigational domain. The navigational domain contains navigational magnetic energy and disturbing magnetic energy, and the field influencing object produces the disturbing magnetic energy in response to the navigational magnetic energy. The correction system includes a first transmitter for projecting into the navigational domain field energy in a first waveform sufficient to induce a first signal value in the sensing coil. The system also includes a second transmitter for projecting into the navigational domain field energy in a second waveform sufficient to induce a second signal value in the sensing coil. The system further includes a signal processor for receiving the first signal value and for receiving the second signal value to determine the effect of the electrically conductive object on the field senior. In other embodiments, the correction system may utilize a second sensing coil to receive and process an alternate aspect of the field energy from a position that is different from the first field sensor, or the system m…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.