Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Reexamination Certificate
2007-02-27
2007-02-27
Shrivastav, Brij (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
C324S318000
Reexamination Certificate
active
10541449
ABSTRACT:
The invention relates to a high-frequency system for an MR apparatus with a high-frequency coil arrangement comprising a plurality of resonator elements (104), which is connected to a transmit unit (106), where a respective transmit channel (1–8) of the transmit unit (106) is assigned to the resonator elements (104). In order to provide a high-frequency system of this kind at low cost, by means of which a high frequency field can be generated in an examination volume (100) with a field distribution that can be preselected flexibly and variably, the invention proposes that the transmit unit (106) is equipped with a plurality of high-frequency amplifiers (107), the inputs of which can receive low-power transmit signals via a first controllable multiplexer/distributor network (108), in which the output signals of the high-frequency amplifiers (107) can be distributed over the transmit channels (1–8) via a second controllable multiplexer/distributor network (109). In addition, the invention relates to an MR apparatus with a high-frequency system of this kind.
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Gräβlin Ingmar
Leussler Christoph Günther
Fay Sharpe Fagan Minnich & McKee LLP
Koninklijke Philips Electronics , N.V.
Shrivastav Brij
Vaughn Megann E
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