Coil decoupling for an RF coil array
US8138762B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 2009 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Dec 22, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3628
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An MRI phase RF coil array includes a plurality of separate RF coil elements where each coil element has a pre-amplifier circuit with a conditioning circuit in advance of the transistor including an inductor and capacitors connected across the input of preamplifier. Each of the coil elements has a preamplifier decoupling parallel resonant circuit for generating a tuned high impedance across the ends of the coil so as to inhibit coupling in the coil from signals in adjacent and non-adjacent coils of the array. The decoupling circuit comprises a fixed first capacitor across the ends, a second variable capacitor in one of the leads, a further capacitor in the conditioning circuit, all of which define a capacitance which co-operates with the inductance defined by the inductor of the conditioning circuit of preamplifier to form the parallel resonant circuit to generate the high impedance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.