Arrangement to detune a reception antenna in a local coil

US8085048B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Stephan Biber · Erlangen, DE
• Helmut Greim · Höchstadt an der Aisch, DE
• Joerg Christopher Stapf · Erlangen, DE

Key dates

• Filing date: Mar 16, 2009
• Grant date: Dec 27, 2011
• Expiry date: Jan 23, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/341
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An arrangement to detune a reception antenna in a local coil of a magnetic resonance system, with at least one reception antenna that is fashioned as a loop antenna and that has at least one first capacitance. Radio-frequency signals of a magnetic resonance examination are received via the reception antenna. A switchable detuning circuit contains the first capacitance connected to an oscillating circuit and a first inductance. A reception device to receive a control signal is coupled with the oscillating circuit. The reception device switches the oscillating circuit into a high-resistance state given a received control signal so that a receipt of a radio-frequency signal via the reception antenna is prevented. The reception device is fashioned to receive a wirelessly transmitted radio-frequency control signal. The radio-frequency control signal has a frequency that lies outside of the bandwidth of the radio-frequency signal used for magnetic resonance examination.