Nuclear magnetic resonance apparatus with surface coil detection
US5006803A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1987 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Mar 26, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/341
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For measurements with increased accuracy in a nuclear magnetic resonance apparatus, the detection device is equipped with one or more surface coils which act as measuring coils. To avoid mutual interference between a radio-frequency transmitting coil and the measuring coil, the measuring coil is provided with a decoupling circuit. The surface coil and the decoupling circuit form a part of a tuned circuit which is tuned to a significantly higher natural frequency during activation of the transmitting coil. On the other hand, the transmitting coil is shorted during detection with the surface coil by a low resistance shorting circuit, thereby avoiding interference with the radio-frequency transmission signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.