System for local error compensation in electromagnetic tracking systems
US9733336B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2007 |
| Grant date | Aug 15, 2017 |
| Priority date | — |
| Expiry date | Jun 8, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/3975
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system for local metal distortion correction for using an accurate electromagnetic tracking system in a medical environment comprises an electromagnetic field generator monitoring a medical device having a suitable sensor coil. A correction function, derived from an error correction tool, is applied to the position and orientation readings of the sensor coil. The error correction tool comprises a number of electromagnetic sensors arranged in a fixed and known geometric configuration and is placed surrounding the site of the medical procedure. Sensor data is displayed on an imaging system. In addition, a distortion mapping can be done utilizing optical sensors for relative positioning readings along with an electromagnetic tracking system sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.