A magnetic resonance imaging system configured for acquiring magnetic resonance images of at least a portion of a subject of interest, comprising: - at least one magnetic resonance radio frequency antenna device that is designed as at least one out of - a magnetic resonance radio frequency surface transmit antenna connectable to a radio frequency transmitter and being configured for receiving radio frequency power from the radio frequency transmitter and for applying a radio frequency excitation field B 1 in a high-frequency frequency band to nuclei of or within the portion of the subject of interest for magnetic resonance excitation, and - a magnetic resonance radio frequency surface receive antenna that is configured for receiving magnetic resonance signals in the high-frequency frequency band from nuclei of or within the portion of the subject of interest that have been excited by applying a radio frequency excitation field B 1, and - at least one metal detector unit 2. configured for detecting a metal object within the subject of interest and including at least one metal detector coil, that is tuned to be resonant in a low-frequency band which is below the high-frequency frequency band, whereby a metal object is detected by said at least one metal detector coil on the basis of induced eddy currents which cause induced signals having a high signal level in said low-frequency band, and wherein the at least one magnetic resonance radio frequency antenna device and the at least one metal detector coil mechanically or electrically or spatially form an integral unit. - at least one magnetic resonance radio frequency antenna device that is designed as at least one out of - a magnetic resonance radio frequency surface transmit antenna connectable to a radio frequency transmitter and being configured for receiving radio frequency power from the radio frequency transmitter and for applying a radio frequency excitation field B 1 in a high-frequency frequency band to nuclei of or within the portion of the subject of interest for magnetic resonance excitation, and - a magnetic resonance radio frequency surface receive antenna that is configured for receiving magnetic resonance signals in the high-frequency frequency band from nuclei of or within the portion of the subject of interest that have been excited by applying a radio frequency excitation field B 1, and - a magnetic resonance radio frequency surface transmit antenna connectable to a radio frequency transmitter and being configured for receiving radio frequency power from the radio frequency transmitter and for applying a radio frequency excitation field B 1 in a high-frequency frequency band to nuclei of or within the portion of the subject of interest for magnetic resonance excitation, and - a magnetic resonance radio frequency surface receive antenna that is configured for receiving magnetic resonance signals in the high-frequency frequency band from nuclei of or within the portion of the subject of interest that have been excited by applying a radio frequency excitation field B 1, and - at least one metal detector unit 2. configured for detecting a metal object within the subject of interest and including at least one metal detector coil, that is tuned to be resonant in a low-frequency band which is below the high-frequency frequency band, whereby a metal object is detected by said at least one metal detector coil on the basis of induced eddy currents which cause induced signals having a high signal level in said low-frequency band, and wherein the at least one magnetic resonance radio frequency antenna device and the at least one metal detector coil mechanically or electrically or spatially form an integral unit.