NMR imaging apparatus
US4700136A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 8, 1985 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Nov 8, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3875
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An NMR imaging domain is required to have a uniform distribution of static magnetic field. However, it is very difficult to generate a uniform magnetic field for an entire imaging domain, which is usually a spherical domain. The invention advantageously, exploits the requirement that to obtain imaging the static magnetic field need only be uniform as the slicing part. Thus, sufficient uniformity of static magnetic field is obtained in the invention by providing one or more shim coils to a static magnetic field generating coil and selectively controlling current to be applied to each shim coil in relation to data defining the imaging domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.