Magnetic resonance imager with removable element RF coil
US5457387A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1993 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Jul 6, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A primary gradient coil assembly (22) is mounted in the inner bore or cylinder (20) of a vacuum dewar (18) that surrounds a superconducting magnet assembly (10). A pair of end ring assemblies, such as electrically conductive lapped segment loops (38) are supported by the gradient coil assembly (22). The end ring segments are capacitively coupled. A plurality of removable radio frequency coil element assemblies (40) are selectively attached to and detached from the gradient coil assembly. Each of the removable RF coil element assembly includes a dielectric housing (50), a longitudinally extending conductor element (52), an electrical connector (44), and circuit components (54) which connects the longitudinal conductor element with the electrical connector. The connector is electrically connected, at radio frequencies, with the ring assembly (38). A mechanical interlock (60) mechanically locks and selectively releases the removable element assemblies (40) to the gradient coil assembly. Sets of different removable element assemblies are provided with different effective radii, i.e. different physical displacements of the electrical conductor elements (52) from the gradient coil assemb…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.