Energy and Timing Measurement with Time-Based Detector Readout for PET Applications: Principle and Validation with Discrete Circuit Components.-猫眼课题宝

DOI：

10.1016/j.nima.2011.03.033

发表时间：

2011-06-11

期刊：

Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

Sun X;Lan AK;Bircher C;Deng Z;Liu Y;Shao Y

来源链接：

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3129980/?report=classic

一种用于PET应用的新型信号处理方法已经开发出来，该方法使用离散电路组件来测量伽马相互作用的能量和时序，仅基于数字时序处理，而不使用幅数转换器（ADC）或常数分数鉴别器（CFD）。在PC板上实现了一种单通道离散元件时基读出电路。初步的电路功能和性能评估已经进行。通过测试脉冲测量，信号幅度测量的精度和线性度都很好。测试脉冲的测量时序精度低于300ps，主要受样机电子电路时序抖动的限制。利用3 × 3 × 20 mm3 LYSO闪烁体和光电倍增管探测器获得了合适的能量和符合定时分辨率（~18%和~1.0 ns）。由于其相对简单的电路和低成本，TBR有望成为紧凑型PET或其他辐射探测器的合适的前端信号读出电子设备，这些探测器需要读取大量的探测器通道，并要求高性能的能量和定时测量。

A new signal processing method for PET application has been developed, with discrete circuit components to measure energy and timing of a gamma interaction based solely on digital timing processing without using an amplitude-to-digital convertor (ADC) or a constant fraction discriminator (CFD). A single channel discrete component time-based readout (TBR) circuit was implemented in a PC board. Initial circuit functionality and performance evaluations have been conducted. Accuracy and linearity of signal amplitude measurement were excellent, as measured with test pulses. The measured timing accuracy from test pulses reached to less than 300 ps, a value limited mainly by the timing jitter of the prototype electronics circuit. Both suitable energy and coincidence timing resolutions (~18% and ~1.0 ns) have been achieved with 3 × 3 × 20 mm3 LYSO scintillator and photomultiplier tube-based detectors. With its relatively simple circuit and low cost, TBR is expected to be a suitable front-end signal readout electronics for compact PET or other radiation detectors requiring the reading of a large number of detector channels and demanding high performance for energy and timing measurement.