A Statistical Model for Positron Emission Tomography Scintillation Detectors with Double-Sided Readout

We describe a statistical model for scintillation detectors. The studied geometry is a tall, cuboidal scintillator, sandwiched by a top and a bottom sensor. We consider singlesided and double-sided readout under head-on as well as side irradiation. We fit our model to published results for 3mm x 3mm x 20mm LYSO:Ce crystals. Fitted parameters are used to predict the performance of double-sided readout under headon irradiation, which gives a better coincidence time resolution than single-sided configurations. When paired with low-mass top sensors to limit signal loss, and thin flex cables for a high packing density, double-sided readout under head-on irradiation may be more favorable than other configurations.