Decoupling circuit for magnetic resonance imaging local coils
AssigneeIGC Medical Advanced, Inc.
InventorsJovan Jectic, Ashok Menon, Derek Seeber
Life of this patent
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Abstract
A decoupling circuit for decoupling an local coil during the application of an RF excitation signal in a magnetic resonance imaging system includes a passive switching circuit for switching an inductor in parallel with a capacitive circuit in the local coil, and a discharge circuit for discharging residual currents from the circuit, therefore allowing for rapid coupling and decoupling of the local coil.
Claims19
A circuit for decoupling a local coil used in a magnetic resonance system, the local coil including at least one series capacitor, the circuit comprising:
- a decoupling inductor providing a parallel resonance at an NMR frequency when connected in parallel with the series capacitor;
- and
- a passive decoupling circuit connecting the decoupling inductor in parallel with the series capacitor upon the presence of an RF excitation signal;
- a discharge circuit for discharging the passive decoupling circuit after conclusion of the RF excitation signal;
- wherein the local coil may to detect an NMR signal after conclusion of the RF signal.
A circuit for decoupling a local coil used in a magnetic resonance system, the local coil including at least one series capacitor, the circuit comprising:
- a decoupling inductor providing a parallel resonance at an NMR frequency when connected in parallel with the series capacitor;
- and
- an active decoupling circuit connecting the decoupling inductor in parallel with the series capacitor upon the application of a decoupling signal;
- a passive decoupling circuit connecting the decoupling inductor in parallel with the series capacitor upon the presence of an RF excitation signal;
- a discharge circuit for discharging the passive decoupling circuit after conclusion of the RF excitation signal;
- wherein the local coil may detect an NMR signal after conclusion of the RF signal.
Dependencies are inferred from the claim text.