Nuclear magnetic resonance systems
US4355282A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1980 |
| Grant date | Oct 19, 1982 |
| Priority date | — |
| Expiry date | Jul 29, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/5616
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is related to the so-called "echo-planar" method of NMR imaging. In that method a resonance is first excited in a slice and then two orthogonal gradients provided dispersion in the slice. One gradient is pulsed to space the frequencies of spins in adjacent strips allowing the other gradient to provide dispersion down the strips. It is now proposed to pulse the second gradient so that the dephasing down each strip is also in steps. The FID signals (including rephasing signals) for each distinct element so produced can then be put in an array and two-dimensionally Fourier transformed to yield the desired output for each element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.