Patent ID: 8073527

Claim:
A field generating unit of a combined MR/PET system, the field generating unit surrounding an examination tunnel, wherein a displaceable couch board is configured to be introduced into and withdrawn from the examination tunnel, and the displaceable couch board is further configured to hold an object to be examined, the field generating unit comprising: a main magnet configured to generate a constant magnetic field in the examination tunnel; a PET detector ring radially surrounding the examination tunnel, the PET detector ring being configured to detect gamma rays; an internal RF antenna arrangement configured to receive MR signals, the internal RF antenna including a first part installed in the examination tunnel and arranged underneath the couch board when the couch board is introduced into the examination tunnel, and including a second part configured to be placed onto the couch board and introduced into and withdrawn from the examination tunnel together with the couch board, the second part of the internal RF antenna arrangement including a cross section adapted to a cross section of the object to be examined, and an accommodating device in the examination tunnel, the accommodating device being configured to hold the second part of the internal RF antenna arrangement in the field generating unit while the couch board is pushed through the examination tunnel.