NMR imaging device, method for correcting inhomogeneity and method for making magnets used in this device
US5168231A · kind A · utility
12Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 11, 1990 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | May 11, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3873
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Inhomogeneities in a magnetic field are corrected by means of openings of square or polygonal cross-section in the periphery of the magnet. Permanent magnets required for obtaining the desired correction are lodged in the openings. Thus, the orientation of the permanent magnets can only assume a limited number of values, which simplifies the calculation to determine the positions of the magnets used to correct the inhomogeneity of the magnetic field. It is mainly applicable to the correction of inhomogeneity of the magnetic field of a magnet used in nuclear magnetic resonance imaging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.