In a method and magnetic resonance (MR) apparatus for establishing implant information about a patient based on an MR scan of the patient, the MR scan is performed by implant-safe settings in the control parameters. The MR signals acquired in this scan are reconstructed to produce image data, and the image data are searched for at least one weak-signal region in a computer search. Implant information about the patient are generated by the computer dependent on the result of the search for the at least one weak-signal region, and the implant information is made available as an electronic output from the computer.