Active radio frequency coil providing negative resistance for high field magnetic resonance imaging
US7876101B2 · kind B2 · utility
14Cited by
20References
48Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 7, 2005 |
| Grant date | Jan 25, 2011 |
| Priority date | — |
| Expiry date | Jun 19, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3415
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
As the static magnetic field used in Magnetic Resonance Imaging (“MRI”) instruments increases the resonance frequency also increases. Consequently, the signal lost due to the coil becomes an issue. To compensate for this loss, it is possible to use an active device, such as a diode, a transistor, etc., with the radio frequency coil, MRI arrangement and method according to exemplary embodiments of the present invention to generate negative resistance to cancel the coil loss resistance. In this manner, the efficiency of the RF coil at high frequency can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.