Orthogonal adjustment of magnetic resonance surface coils
US5521506A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1993 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Nov 19, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3678
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An NMR magnetic coil system (10) is disclosed wherein the isolation between the coils (16, 18) can be adjusted to decrease or virtually eliminate the coupling between quadrature magnetic resonance imaging coils (16, 18). At least one of the coils (16) is separated into parallel segments (20, 22), located in a critically overlapped area. The capacitance of the segments is adjusted by a differential capacitor (76) to vary the ratio of the RF current flowing through the parallel segments. Appropriate adjustment of the capacitance of these paths (20, 22) causes a sharing of the appropriate amount of the out of phase flux to cancel the balance of the shared flux and therefore results in a net mutual inductance of zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.