Active resistive shimming fro MRI devices
US8981779B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2011 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Jan 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/4814
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Active resistive shim coil assemblies may be used in magnetic resonance imaging (MRI) systems to reduce in-homogeneity of the magnetic field in the imaging volume. Disclosed embodiments may be used with continuous systems, gapped cylindrical systems, or vertically gapped systems. Disclosed embodiments may also be used with an open MRI system and can be used with an instrument placed in the gap of the MRI system. An exemplary embodiment of the active resistive shim coil assembly of the present disclosure includes active resistive shim coils each operable to be energized by separate currents through a plurality of power channels. In some embodiments, the disclosed active resistive shim coil assemblies allow for various degrees of freedom to shim out field in-homogeneity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.