Image formation using nuclear magnetic resonance
US4021726A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1975 |
| Grant date | May 3, 1977 |
| Priority date | — |
| Expiry date | Sep 4, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3607
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Nuclear magnetic resonance apparatus designed to enable two and three dimensional images of objects to be obtained has coils for applying a static magnetic field and for applying magnetic gradients to the field in each of three orthogonal directions over the entire volume of a sample and a radio frequency signal generator for applying signals having selected frequency components simultaneously with the magnetic field gradients. In use the spins in all regions of a sample except a slice are saturated or excited in the presence of one magnetic field gradient then a slot in the slice is energized in the presence of a second magnetic field gradient and the free induction decay from the slot read out in the presence of a third gradient. The procedure is repeated for successive slots in a slice and for successive slices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.