Nuclear magnetic resonance apparatus having a communication system
US4689565A · kind A · utility
8Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1985 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Jun 24, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/283
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a nuclear magnetic resonance apparatus, a loudspeaker element free of magnetic material acts as an acoustic reproduction element. The loudspeaker element is arranged in the magnet space so that the main field of the magnet acts to generate a Lorentz driving force for the element. Together with a microphone function or an additional microphone (50) and an external loudspeaker.microphone system, a two-way acoustic communication system can thus be formed. Such a loudspeaker element free from magnetic material does not produce field disturbances in the magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.