High-field nuclear magnetic resonance imaging/spectroscopy system
US4689563A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1985 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Jun 10, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3815
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic resonance system for both imaging and spectroscopy of a sample of non-magnetic material (such as a portion of the human anatomy and the like) at one static magnetic field magnitude in excess of 0.7 Tesla (T), utilizes a superconducting magnet having a room-temperature bore of diameter sufficiently large to place therein not only the desired sample but also a set of gradient magnetic field-producing coils and at least one radio-frequency coil for exciting and/or receiving response signals from the sample to be examined. The entire magnetic system has suitably-small temporal and positional field variations to allow imaging to be accomplished at the resonant frequencies of nuclei including .sup.1 H, .sup.13 C, .sup.19 F, .sup.23 Na and .sup.31 P. The system includes a novel interface subsystem, itself including a novel gradient signal switching circuit, for acquiring imaging data in relatively short time intervals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.