Patent ID: 7728590

Claim:
A detection unit, comprising: an RF transceiver system, to at least one of transmit RF pulses and receive MR signals; and a PET detector to detect gamma rays, the RF transceiver system and PET detector being arranged radially around a patient tunnel and the RF transceiver system including an antenna system divided into two parts in a longitudinal direction of the patient tunnel, a first part being arranged in the longitudinal direction upstream and the second part being arranged in the longitudinal direction downstream of the PET detector, the first and second parts of the antenna system being configured to generate a spatially homogenous RF field in a middle of a patient tunnel by superimposing fields of the first and second parts of the antenna system, and images of at least partially overlapping image volumes being acquirable with the RF transceiver system and the PET detector, wherein each of the first part and the second part of the antenna system is provided with exactly one annular conductor, wherein a row of conductors aligned in the longitudinal direction emanates from each annular conductor towards the PET detector and the annular conductors of the first part and the second part of the antenna system being arranged on an outer side of the patient tunnel.