Shimmed facility and shimming method employing multiple rolling bodies non-fixedly positioned in a tube
US6765382B2 · kind B2 · utility
4Cited by
21References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2002 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Sep 26, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3873
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A facility for generating a uniform magnetic field, particularly for generating a basic magnetic field of a magnetic resonance examination apparatus, particularly a medical magnetic resonance tomography apparatus, has a shim device with a guide device to or in which a number of ferromagnetic articles, such as balls, are movably attached. At least two of the articles have ferromagnetic properties differing from one another, such as saturation magnetizations that differ in magnitude from one another. A method for improving the homogeneity of a magnetic field makes use of such a facility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.