A compact Detector Module for Time of Flight PET and the associated DAQ system

A compact Detector Module for Time-Of-Flight PET integrating 128 gamma-ray detection pixels of 3.5×3.5×15 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> LYSO crystals associated to MPPC photosensors has been developed in the framework of the EndoTOFPET-US collaboration. The module has two 64-channel readout ASICs integrating signal conditioning and discrimination circuitry and high-performance TDCs for each channel, featuring 25 ps r.m.s intrinsic resolution and fully digital output (up to 640 Mb/s). The data acquisition system is based on frontend boards, each collecting the data of 1024 channels (8 Detector Modules) and transmitting assembled data frames through an electrical serial link (1.6 Gbps) or two high-speed optical links (2×6.4 Gb/s), and a single DAQ board on the PCIe bus of the acquisition PC. In this work, we present the design and preliminary results of characterization of the Detector Modules and associated DAQ system.