[en] A new Positron Emission Tomography detector setup with depth of interaction facility, using a segmented crystal of cerium doped lutetium oxyorthosilicate as scintcillator and a wave length shifting fibre readout has been investigated. This detector configuration has been chosen in order to reduce the number of photo-multipliers and electronic channels, simultaneously minimising the cost of the device. For this purpose a 4 x 4 cross plate anode position sensitive photo-multiplier tube has been tested as readout device for wave length shifting fibres. The spatial resolution as function of the number of photoelectrons and position at the x-y-plane have been studied using light emitting diodes. In addition we estimated the average number of photons reaching the photo-cathode of the photo-multiplier tube by Monte Carlo simulation, when a segmented crystal setup with wave length shifting fibre readout is used