Offset gradient fields in nuclear magnetic resonance imaging systems
US4636728A · kind A · utility
9Cited by
6References
13Claims
0Family size
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Key dates
| Filing date | Jun 18, 1984 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Jun 18, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/381
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The null point in the gradient field of an NMR imaging system is offset from its nominal position in the static magnetic field by application of a bias field to the gradient field. The bias field produces a substantially uniform offset in the field intensity at every point in the gradient field. Alternatively, null point offset may be achieved by controllably superimposing two gradient fields of separately located null points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.