Shielded, asymmetric magnets for use in magnetic resonance imaging
US7375528B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2006 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | Jul 3, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/421
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Magnetic resonance systems are provided which employ a shielded, asymmetric magnet to produce an offset dsv. The magnets include at least a first coil C1, which carries current in a first direction, and two coils C2 and C3, which are located at least in part within the internal envelope EC1 defined by the first coil and which carry current in an opposite direction to the first coil. The magnets are shielded by a shielding coil C4, which carries current in a direction opposite to that of the first coil, and/or a ferromagnetic structure (FS). The magnets can include additional coils, such as a fifth coil C5 at the magnet's distal end. The magnets can be used in, for example, orthopedic imaging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.