A local coil arrangement for a magnetic resonance apparatus has a support
structure with an antenna arrangement and a sensor arrangement embedded
in the support structure. The antenna arrangement has a number of
magnetic resonance antennas. A magnetic resonance excitation signal can
respectively be emitted by means of each magnetic resonance antenna
and/or a magnetic resonance signal can respectively be received by means
of each magnetic resonance antenna. The sensor arrangement has a number
of magnetic field sensors and an evaluation circuit. The magnetic field
sensors detect how large a static magnetic field is to which the local
coil arrangement is exposed and output a corresponding output signal and
supply a corresponding output signal to the evaluation circuit. The
evaluation circuit determines a logical presence signal and outputs it.
The value of the logical presence signal depends on whether a field
strength of the static magnetic field is greater than a minimum field
strength.