Shimming assistance unit, shimming assistance method, MRI apparatus and magnet apparatus
US9964613B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 2014 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | Jul 13, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/202
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The shimming work assistance unit performs singular value decomposition of a response matrix, which represents the relationship between an error magnetic field distribution and an adjusted magnetic moment placement distribution. From the multiple eigenmodes obtained, the eigenmodes are selected and added one by one in order from the eigenmode with the highest singular value, and the residual magnetic field error, which represents the fluctuation range of the difference between the magnetic field distribution, generated by the placement of the shimming magnetic moments corresponding to said eigenmode, and the error magnetic field distribution, is displayed on a display unit as a function graph of eigenmode order (line graph (1)).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.