PET scintillator arrangement on digital SiPMs

A typical high resolution PET detector consists of a matrix of scintillator elements which are connected to a light guide in order to spread the light onto the pixels of a photo detector. In this work we introduce a matrix that works without light guide but has defined internal light leaks in order to allow controlled light sharing between the individual scintillator elements. This is especially useful when used together with the Philips digital SiPM DPC 3200. We show that better position determination is achieved and in addition higher count rates should be possible compared to a classical light guide solution.