Body coil and magnetic resonance imaging system

A magnetic resonance imaging apparatus comprising:

• a data acquisition scanner comprising a body coil;
• said body coil comprising a conductor arrangement comprising two end rings and a plurality of antenna rods connected between said two end rings and uniformly distributed around respective circumferences of said two end rings;
• said body coil further comprising a tuning/detuning circuit connected to said conductor arrangement, said tuning/detuning circuit being configured to provide a control signal to said conductor arrangement from a control signal interface of the tuning/detuning circuit, said control circuit also comprising a number of switch diode units and an equal number of AC/DC conversion circuits that provide respective control signals to said control signal interface, with each of said switch diode units via control signals comprising a DC current signal that places a respective switch diode supplied within a conducting state;
• said at least one switch diode unit being series-connected on at least one antenna rod or on at least one end ring of said current arrangement, said at least one switch diode unit comprising at least one switch diode connected in series or in parallel;
• each AC/DC conversion circuit comprising a rectifying circuit that converts power of an input RF emission signal of said magnetic resonance imaging apparatus to a DC current that is then embodied in said DC current signal;
• and
• each AC/DC conversion circuit comprising a first shunt inductor connected in series with the rectifying circuit, and wherein said tuning/detuning circuit comprises at least one second inductor, equal in number to the number of switch diode units, each second shunt inductor being connected in series with one switch diode unit on an antenna rod or an end ring of the conductor arrangement, to form a switch unit on said antenna rod or end ring, and wherein two terminals of each AC/DC conversion circuit are connected respective to two terminals of one switch unit, and wherein said first shunt inductor and said second shunt inductor shunt said input RF emission signal on said switch diode unit and said rectifying circuit.