Method for improving selectivity in NMR experiments involving coherence transformation
US5325058A · kind A · utility
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Key dates
| Filing date | Mar 12, 1993 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Mar 12, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/4608
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Coherence transformation selectivity is improved by using combinations of homogeneous RF pulses and "radial" RF pulses that have a uniform RF field strength throughout the sample, but whose phase (relative to the detection coil phase) has a spatial dependence such that all possible phase differences are equally represented throughout the sample. The use of radial pulses allows the spin coherences in the sample to evolve in spatial waves and the observation, or suppression, of a given coherence can be selected by using a receiver coil which has a predetermined symmetry relative to the symmetry of the spatial wave.
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