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US 8,138,761 B2Granted
Receiver for a wireless magnetic resonance imaging scanner with notch-filters and a 90° hybrid couplers forming a complete circuit loop
AssigneeSiemens Aktiengesellschaft
InventorMark Evans
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Abstract
A receiver for a wireless magnetic resonance imaging system comprises a pair of substantially identical notch filters (22, 23) each having an input and output and first and second 90 degree hybrid couplers (21, 24). The notch filters are coupled together at each input and output by the first and second 90 degree hybrid couplers respectively.
Claims10
A magnetic resonance signal receiver configured for a wireless magnetic resonance imaging system, comprising:
- a pair of substantially identical notch filters, each of said notch filters having an input and an output;
- a first 90° hybrid coupler and a second 90° hybrid coupler, said first 90° hybrid coupler having an input that receives a magnetic resonance signal, and two outputs;
- said second 90° coupler having two inputs and an output;
- and
- said two outputs of said first 90° coupler being respectively connected to the inputs of said notch filters, and said outputs of said notch filters being respectively connected to said two inputs of said second notch filter.
2 more elements
A wireless magnetic resonance imaging system comprising:
- a magnetic resonance data acquisition unit comprising gradient coils, a plurality of local coils, a local oscillator and a receiver;
- and
- said receiver comprising a pair of substantially identical notch filters, each of said notch filters having an input and an output, a first 90° hybrid coupler and a second 90° hybrid coupler, said first 90° hybrid coupler having an input that receives a magnetic resonance signal, and two outputs, said second 90° coupler having two inputs and an output, and said two outputs of said first 90° coupler being respectively connected to the inputs of said notch filters, and said outputs of said notch filters being respectively connected to said two inputs of said second notch filter.
Dependencies are inferred from the claim text.