Method and apparatus for detecting the position and the orientation of an interventional device
US7239400B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2004 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Feb 4, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/0322
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method and an apparatus for measuring the position and the orientation of an interventional device within a magnetic resonance imaging apparatus, the magnetic resonance image apparatus providing a static magnetic field B0 and magnetic field gradients with known magnetic flux densities and directions. The invention includes attaching a Faraday sensor to the interventional device, the Faraday sensor being connected to an optical measuring device. The method also includes using the optical measuring device for measuring the rotation of the plane of polarization of linearly polarized light in the Faraday sensor, while exposing the interventional device: (i) to the static magnetic field B0, and (ii) to the field gradients in all three directions of space in addition to the static magnetic field B0. The method also includes determining the position and the orientation of the interventional device by evaluating the measured rotation of the plane of polarization of the linearly polarized light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.