Active compensation for field distorting components in a magnetic resonance imaging system with a gantry
US10324148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2014 |
| Grant date | Jun 18, 2019 |
| Priority date | — |
| Expiry date | Aug 20, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/56563
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A medical apparatus (300, 400, 500) includes a magnetic resonance imaging system (306); magnetic compensation coils (334, 335) for compensating for magnetic inhomogeneities within the imaging zone; a gantry (308) operable for rotating about the imaging zone; a position sensor (312) for measuring the angular position and the angular velocity of the gantry; at least one magnetic field distorting component (310, 510, 512) in the gantry; and a memory (362) storing machine executable instructions (380, 382, 410, 530, 532) and field correction data (372). The instructions cause a processor to: receive (100, 200) the position and angular velocity data from the position sensor; determine (102, 202) coil control commands (374) for controlling the magnetic compensation coils using the field correction data, the position data and the angular velocity data; control (104, 204) the magnetic compensation coils to compensate for magnetic inhomogeneities within the imaging zone using the coil control commands; and acquire (106, 212) the magnetic resonance data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.