Device and method for automatic shimming of NMR instrument
US4761614A · kind A · utility
28Cited by
11References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1987 |
| Grant date | Aug 2, 1988 |
| Priority date | — |
| Expiry date | Apr 27, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3875
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device and method for rapidly performing automatic magnet shimming using algebraic techniques, based on field maps computed by phase measurement within Carr-Purcell echo sequences. The correction computation for determining shim currents is carried out by a linear programming algorithm which compensates field inhomogeneities within the sample by a linear combination of all the shims. The procedure is non-iterative, thus avoiding instability problems and improving speed performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.