A method is for providing an attenuation map of a patient, suitable for correcting PET data of the patient acquired with combined magnetic resonance/positron emission tomography imaging in a magnetic resonance/positron emission tomography system. In an embodiment, the method includes acquiring magnetic resonance data with at least one imaging scan in the magnetic resonance/positron emission tomography system； determining the attenuation map of the patient using the magnetic resonance data and providing the attenuation map of the patient for correcting the PET data of the patient acquired with combined magnetic resonance/positron emission tomography imaging.
