Methods of imaging solids by NMR techniques
US4833411A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1987 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Sep 2, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/4816
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sequence of a pair of r.f. pulses (90.sub.x .degree. and 90.sub.y .degree.) is applied to a solid being imaged with a time interval (.tau.) after each pulse. A static magnetic field is maintained and a magnetic gradient field is superimposed in the said time intervals, the time integrals of the gradient magnitudes of the gradient fields being equal. A free induction solid echo signal is detected at the end of the second time interval. The sequence is repeated for different values of the time integral are to obtain a set of signals and Fourier transformations with respect to the said time integral are then carried out on the set to obtain one-dimensional information. Two-dimensional information can be obtained from a plurality of sets of signals, each set being obtained in the presence of an additional orthogonal gradient field of differing value for each set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.