Development of an FPGA-based data acquisition module for small animal PET
Development of an FPGA-based data acquisition module for small animal PET
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DOI：
10.1109/tns.2006.876004
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发表时间：
2006-10-01
影响因子：
1.8
通讯作者：
Kerek, A.
中科院分区：
文献类型：
--
作者：
Imrek, J.;Novak, D.;Kerek, A.
我们报告了一个数据采集（DAQ）模块的设计为一个小动物PET相机在我们的研究所开发。在设计过程中，一个重要的指导方针是开发一个由严格相同的DAQ模块组成的系统，并且对模块的最大数量没有内置的硬件限制。所开发的DAQ模块包括LSO闪烁晶体块、位置敏感PMT、模拟信号调理电路、数字化仪、用于数字信号处理的现场可编程门阵列（FPGA）和通信模块，通过通信模块将采集的数据发送到计算机集群进行后处理和存储。在我们的设计中，我们没有在模块之间实现硬件一致性检测，而是在每个事件上附加一个精确的时间戳，并且在后处理过程中由数据收集计算机确定一致性。在FPGA上实现的数字CFD算法对真实探测器信号的时域分辨率为2 ns FWHM。
We report on the design of a data acquisition (DAQ) module for a small animal PET camera developed at our institutes. During the design an important guideline was to develop a system which is built up from strictly identical DAQ modules, and which has no built-in hardware limitation on the maximum number of modules. The developed DAQ module comprises of an LSO scintillator crystal block, a position sensitive PMT, analog signal conditioning circuits, a digitizer, an field programmable gate array (FPGA) for digital signal processing, and a communication module through which the collected data are sent to a cluster of computers for postprocessing and storage. Instead of implementing hardware coincidence detection between the modules, we attach a precise time stamp to each event in our design, and the coincidence is determined by the data collecting computers during postprocessing. The digital CFD algorithm implemented in the FPGA gives a time resolution of 2 ns FWHM for real detector signals.