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A PET data acquisition (DAQ) system based on multiple high-speed, 8-channel DAQ cards is being developed. Each of these DAQ cards has 8-channel 14-bit 100 MHz simultaneous ADCs, a six million-gate FPGA with 104 MHz onboard clock and a 16-bit 128 MB SDRAM. The SDRAM has a data transfer bandwidth of 450 MB/S, thus for raw data acquisition, only two channel ADCs can be simultaneously used at sampling...
A Geiger-mode avalanche photodiode (GAPD) array-based MRI compatible PET is being developed in our laboratory. The purpose of this study is to develop filtering methods for PET event signals contaminated by RF pulses for simultaneous PET-MR imaging. The detector for the MRI compatible PET was composed of LYSO scintillators coupled with GAPD arrays. PET signal acquisition was implemented by a FPGA-based...
A simple and improved digital timing method has been developed for positron emission tomography (PET). The so-called initial rise interpolation method is based on an important characteristic of gamma signal: a properly pre-amplified and sampled gamma signal pulse can be characterized to arrive with an initial rise from baseline and then to go up with a maximum rise. Pulse arrival time is obtained...
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