Patent ID: 7916920

Claim:
A magnetic resonance scanner with a magnetic resonance system comprising at least two radio frequency transmitter/receiver units which each comprise: (a) a radio frequency transmitter/receiver coil, (b) a radio frequency current source coupled to the radio frequency transmitter/receiver coil for the transmission, (c) an amplifier coupled to the radio frequency transmitter/receiver coil for the reception, (d) a changeover switch designed to key a supply voltage to separate the amplifier in a transmission process and the radio frequency current source in a reception process from the radio frequency transmitter/receiver coil, (e) an inductor and a capacitor provided between the radio frequency transmitter/receiver coil and the amplifier and forming a series-resonant circuit at the magnetic resonance frequency, (f) a first diode arranged between the changeover switch ( 9 ) and the capacitor of the series-resonant circuit, and (g) a second diode arranged between the radio frequency current source and the radio frequency transmitter/receiver coil, wherein, by means of the changeover switch, the magnetic resonance system (i) can be brought into a transmission mode in which the first diode conducts and the radio frequency current source actuates the radio frequency transmitter/receiver coil using a radio frequency coil current, and (ii) can be brought into a reception mode in which the second diode has a high resistance and a voltage from the radio frequency transmitter/receiver coil reaches the amplifier via the inductor and the capacitor.