Nuclear magnetic resonance radio frequency antenna
US4797617A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1986 |
| Grant date | Jan 10, 1989 |
| Priority date | — |
| Expiry date | Nov 21, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3657
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A nuclear magnetic resonance radio frequency coil. The disclosed coil provides high frequency resonance signals for perturbing a magnetic field within the coil. The coil is impedance matched and tuned with adjustable capacitors. A balanced configuration is achieved with a co-axial cable chosen to phase shift an energization signal coupled to the coil. The preferred coil is a thin metallic foil having a shorting conductor, four wing conductors, and uniquely shaped parallel cross conductors connecting the shorting and wing conductors. When mounted to an rf transmissive plastic substrate and energized the coil produces a homogenous field within a region of interest the size of a patient head. A semicircular balanced feedbar arrangement is used to minimize undesired field contributions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.