Magnetic resonance trajectory correcting with GRAPPA operator gridding
US9417306B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2012 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Feb 9, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/4824
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus, methods, and other embodiments associated with magnetic resonance (MR) trajectory correcting using GRAPPA operator gridding (GROG) are described. One example method includes identifying an on angle or regular portion of a projection in an MR trajectory and then computing base GROG weights for that portion. The example method includes identifying a shift direction and a shift amount for the projection. The shift direction is configured to shift the projection towards a desired point in k-space and the shift amount is configured to shift the projection by a desired amount in the shift direction. With a shift direction and amount available, the example method corrects for a gradient delay by manipulating the MR source signal data using the shift direction and the shift amount. In one embodiment, a gradient delay can be determined and used to calibrate an MRI apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.