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RECENTLY, there has been great interest in the study of deriving PET event information from digitally sampled event waveforms. We have reported the feasibility of Multi-Voltage Threshold (MVT) based PET DAQ system using field — programmable-gate-array (FPGA) without ADC and TDC. The goal of this study was to extend MVT based multi-channel analog circuit and DAQ with FPGA which could be utilized for...
Time-to-digital converter (TDC) implemented in field-programmable-gate arrays (FPGAs) with the use of tapped delay line (TDL) methods using dedicated carry chain structures has been utilized to obtain precise timing information for time-of-flight (TOF) PET. However, such chain-structural FPGA-based TDCs suffer from the uneven tap delay, which is one of the main limitations for enhancing the timing...
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