Arrangement to detune a reception antenna in a local coil
First Claim
1. An arrangement that detunes a reception antenna in a local coil of a magnetic resonance system comprising:
- at least one reception antenna configured as a loop antenna and having at least one first capacitance said loop antenna being configured to receive radio-frequency signals of a magnetic resonance examination;
a switchable detuning circuit that contains the first capacitance connected to an oscillating circuit and a first inductance;
a reception device configured to receive a wirelessly transmitted radio-frequency control signal that has a separate radio-frequency outside of the bandwidth of the radio frequency signal used for magnetic resonance examination; and
said reception device being configured to switch the oscillating circuit into a high-resistance state upon receipt of said wirelessly transmitted radio-frequency control signal, and said oscillating circuit in said high resistance state being configured to prevent reception of a radio-frequency signal by the reception antenna.
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Accused Products
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.
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Citations
9 Claims
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1. An arrangement that detunes a reception antenna in a local coil of a magnetic resonance system comprising:
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at least one reception antenna configured as a loop antenna and having at least one first capacitance said loop antenna being configured to receive radio-frequency signals of a magnetic resonance examination; a switchable detuning circuit that contains the first capacitance connected to an oscillating circuit and a first inductance; a reception device configured to receive a wirelessly transmitted radio-frequency control signal that has a separate radio-frequency outside of the bandwidth of the radio frequency signal used for magnetic resonance examination; and said reception device being configured to switch the oscillating circuit into a high-resistance state upon receipt of said wirelessly transmitted radio-frequency control signal, and said oscillating circuit in said high resistance state being configured to prevent reception of a radio-frequency signal by the reception antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification