Magnetic field generating device for NMR-CT
US4777464A · kind A · utility
84Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1987 |
| Grant date | Oct 11, 1988 |
| Priority date | — |
| Expiry date | Sep 25, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/383
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic field generating device for the NMR-CT comprises a pair of opposing permanent magnet segments magnetically coupled by a yoke which define therebetween an air gap where a magnetic field is created. Each segment has a pole piece attached to its gap-facing surface. Each segment is composed of a ferrite magnet and a rare earth magnet, one of the two magnets being disposed in the central portion of the segment and the other disposed around the one magnet. The thickness of the ferrite magnet in the direction of attaching it to the yoke is larger than that of the rare earth magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.