MR-apparatus having a transmission-measuring coil for high frequencies
US4707662A · kind A · utility
9Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1985 |
| Grant date | Nov 17, 1987 |
| Priority date | — |
| Expiry date | Jul 5, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3628
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For increasing the sensitivity of an MR apparatus when measuring comparatively high frequencies, the radio frequency excitation measurement coil (10, 30) is divided into two individual symmetrically drivable and readable coil halves (32, 34), respectively. The mutual connection of central connections of the coil halves can be realized by means of a balun (54) but for this purpose any other symmetrical form of coupling, for example using a strip-line transformer (70) or suitably dimensioned coaxial cables (60, 62) may alternatively be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.