Method for slice selection in an NMR MAS solids imaging system
US5208536A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1991 |
| Grant date | May 4, 1993 |
| Priority date | — |
| Expiry date | Jul 2, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/4816
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multiple-pulse RF pulse sequence applied in the presence of an oscillating magnetic field gradient enables slice selection in a magic angle spinning nuclear magnetic resonance solids imaging system. Slice selectivity is produced by a series of RF pulses, some of which introduce a nutation that coherently adds for only a selected slice plane of the sample and averages to zero in other areas and some of which average certain gradient-induced modulations so that only those object areas in the selected slice contribute to the output. The pulse train is applied in a manner synchronous with rotor rotation so that rotation induced modulations average to zero over one or more rotor rotation periods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.