A method for determining an item of evaluation information from a reception signal received by a magnetic resonance apparatus, a computer program product for carrying out such a method, and a magnetic resonance apparatus generate a useful signal having a first frequency band. The magnetic resonance apparatus is configured to generate a magnetic resonance signal in a second frequency band. The first frequency band lies at least partially, (e.g., completely), within the second frequency band. A reception signal is received by a receiving unit of the magnetic resonance apparatus. From the reception signal, an item of evaluation information is determined which characterizes the useful signal.