| 摘要 |
PROBLEM TO BE SOLVED: To provide a high frequency receiver for a magnetic resonance device for which the number of independent antennas is larger than the number of signal processing channels at a low cost. SOLUTION: In this high frequency receiver for the magnetic resonance device provided with many independent antennas 2.1-2.N and preamplifiers 6.1-6.M, the number of the preamplifiers 6.1-6.M is made smaller than the number of the independent antennas 2.1-2.N and a switching matrix 4B for selectively connecting the preamplifiers 6.1-6.M with the antennas 2.1-2.N in terms of signals is arranged at the antennas 2.1-2.N. The antenna not connected to the preamplifier is actively detuned for instance so as to be disconnected from an active antenna. However, in an especially advantageous execution form, the switching matrix and the equivalent circuits 10.1-10.N of the input impedance of the preamplifiers are connected and the equivalent circuits 10.1-10.N can be connected with the antennas 2.1-2.N in terms of the signals by the switching matrix 4B.
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