A method is disclosed for determining a position-dependent attenuation map of at least one high frequency coil of a combined magnetic resonance PET device. A magnetic resonance PET device and a computer program product are also disclosed. The method includes determining at least one first signal frequency for at least one coil element during a magnetic resonance PET examination; determining at least one second signal frequency, wherein at least one gradient field is applied during determination thereof; reconstructing the position of the at least one coil element using the at least one first and second signal frequency; reconstructing the position of the at least one high frequency coil using the reconstructed position of the at least one coil element; and determining a position-dependent attenuation map of the at least one high frequency coil using the reconstructed position of the at least one high frequency coil.