[IEEE 2011 2nd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications (ANIMMA) - Ghent, Belgium (2011.06.6-2011.06.9)] 2011 2nd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications - Design of a monolithic multichannel front-end readout ASIC for PET imaging based on scintillation crystals read out by photodetectors at both ends