Radio frequency coil switching
US5869966A · kind A · utility
16Cited by
1References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 6, 1997 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Jan 6, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3657
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In Magnetic Resonance Imaging Apparatus, it is necessary to switch the radio frequency electric coils which are positioned around the patient in the imaging volume very rapidly. The present invention achieves such switching using switching devices which are sensitive to control signals other than electrical signals. This removes the need to pass additional electrical conductors, which could carry interfering signals, into the imaging volume and this reduces image degradation. In particular the switching devices may be photodiodes which function in response to optical signals carried by optical fibres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.