Method and arrangement for measuring and controlling the basic field of a magnet of a nuclear magnetic tomography apparatus
US5731704A · kind A · utility
17Cited by
9References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1996 |
| Grant date | Mar 24, 1998 |
| Priority date | — |
| Expiry date | Sep 19, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/389
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Two MR magnetic field probes arranged in a centrally symmetrical fashion in relation to the magnetic field center, are attached in the examination area of the magnet. The output signals of the two MR magnetic field probes are supplied to a multiplying RF mixer, and a sum frequency signal is obtained from the output signal of the RF mixer, and the actual value of the basic field is determined from the frequency of this output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.