Figure 1: The photomultiplier tube detector unit from a cPET system (a) which has recently been replaced with a solid-state DPC PET detector unit (b) in the next-generation dPET/CT system. (c) A closer view of the DPC PET detector (Philips Healthcare, Cleveland, Ohio, USA). The DPC PET detector unit enables fully digital 1 : 1 coupling with the scintillation crystals within the dPET detector ring assembly.