基于反馈调节的闪烁脉冲稀疏量化电平方法

doi:10.16180/j.cnki.issn1007-7820.2022.03.001

Abstract

Abstract:

The PET detector uses SQL sampling circuit to process scintillation pulse and fix the quantization level. The electric flipping caused by zero noise leads to abnormal heat of the voltage comparator for a long time, and the lower quantization level cannot be set, which limits the improvement of the detector's coincidence timing resolution. This study proposes a flicker pulse processing method based on feedback adjustment, which uses the switching characteristics of the transistor in the saturation state to perform feedback adjustment on the SQL quantitative samples. The delay element is used to delay and synchronize the quantized samples to generate a quantized level that can vary with the logic level of the sample, avoiding the influence of zero-point noise on the SQL sampling circuit. The experimental results show that compared with the original SQL sampling circuit, the optimized SQL sampling circuit reduces the amount of samples by 29% in the same time, and coincidence timing resolution is improved by 179.3ps, which reduces the useless power of PET detector and improves the coincidence timing resolution of PET system.

Key words: PET, scintillation pulse, SQL, signal processing, sampling circuit design, feedback adjustment, coincidence timing resolution, performance optimization

CLC Number:

TP391

Zhenzhou DENG,Qin HU,Wensheng LAI,Chunlei HAN,Ling TAO. Sparse Quantization Level Method for Scintillation Pulse Based on Feedback Regulation[J].Electronic Science and Technology, 2022, 35(3): 1-7.

Figures/Tables 17

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Figure 10.

Figure 11.

Figure 12.

Figure 13.

Figure 14.

Figure 15.

Figure 16.

Table 1

References 17

[1]	Pizzichemi M, Polesel A, Stringhini G, et al. On light sharing TOF-PET modules with depth of interaction and 157 ps FWHM coincidence time resolution[J]. Physics in Medicine and Biology, 2019,64(15):8-23.
[2]	Sun I K, Emilie R, Alberto G, et al. Dual-ended readout of bismuth germanate to improve timing resolution in time-of-flight PET[J]. Physics in Medicine and Biology, 2019,64(10):1-10.
[3]	Du J W, Bai X W, Alberto G, et al. Performance of a high-resolution depth-encoding PET detector module using linearly-graded SiPM arrays[J]. Physics in Medicine and Biology, 2018,63(3):35-38.
[4]	Berg E, Cherry S R. Innovations in instrumenttation for positronemission tomography[J]. Seminars in Nuclear Medicine, 2018,48(4):311-331.
[5]	干小宇, 宓逸舟, 冯婷婷, 等. 长塑料闪烁体核子料位计的研制[J]. 电子科技, 2015,28(11):51-54.
	Gan Xiaoyu, Mi Yizhou, Feng Tingting, et al. Research on nuclear material level meter based on long plastic scintillator[J]. Electronic Science and Technology, 2015,28(11):51-54.
[6]	Zhao A J, Xiong W, Deng Z Z,et al. A multi-channel device for scintillation crystal testing[C]. Beijing:Proceedings of the IEEE Nuclear Science Symposium and Medical Imaging Conference, 2017.
[7]	邓贞宙. PET探测器闪烁脉冲特征建模[D]. 武汉:华中科技大学, 2014.
	Deng Zhenzhou. Modeling for the scintillation pulse in PET detector[D]. Wuhan:Huazhong University of Science and Technology, 2014.
[8]	Deng Z Z, Wu H D, Xiong W,et al. Threshold optimization in multi-voltage threshold digitizers for TOF PET detector[C]. Beijing:Proceedings of the IEEE Nuclear Science Symposium and Medical Imaging Conference, 2017.
[9]	Nakhostin M. A technique for the reduction of pulse pile-up effect in pulse-shape discrimination of organic scintillation detectors[J]. Nuclear Engineering and Technology, 2020,52(2):360-365.
[10]	Berg E, Roncali E, Hutchcroft W, et al. Improving depth,energy and timing estimation in PET detectors with deconvolution and maximum likelihood pulse shape discrimination[J]. IEEE Transactions on Medical Imaging, 2016,35(11):2436-2446.
[11]	Becker R, Casella C, Corrodi S, et al. Studies of the high rate coincidence timing response of the STiC and TOFPET ASICs for the SAFIR PET scanner[J]. Journal of Instrumentation, 2016,11(12):12001-12012.
[12]	Philippov D E, Popova E V, Belyaev V N, et al. Digital signal processing for SiPM timing resolution[J]. Journal of Physics:Conference Series, 2017,798(1):012220-012220.
[13]	Zhao A, Van B M, Bouwens B, et al. Coincidence velocity map imaging using Tpx3Cam, a time stamping optical camera with 1.5 ns timing resolution[J]. The Review of Scientific Instruments, 2017,88(11):104-115.
[14]	Nakanishi K, Yamamoto S, Watabe H, et al. Development of a circular shape Si-PM-based detector ring for breast-dedicated PET system[J]. Nuclear Instruments & Methods in Physics Research,A, 2018,880(7):118-124.
[15]	Ko G B, Lee J S. Time-based signalsampling using sawtooth-shaped threshold[J]. Physics in Medicine and Biology, 2019,64(12):125020-125034.
[16]	Liang Y F, Yang C W, Xu J Y, et al. Applications in energy spectrum measurement based on pulse fitting[J]. Radiation Detection Technology & Methods, 2019,3(3):1-5.
[17]	刘恒杰, 段嗣昊, 胡昌伦. 基于改进正交匹配追踪算法的信号识别研究[J]. 电子设计工程, 2017,25(7):161-164.
	Liu Hengjie, Duan Sihao, Hu Changlun, et al. Research on recognition signal based on improved orthogonal matching pursuit algoorithm[J]. Electronic Design Engineering, 2017,25(7):161-164.

[1]	. [J]. , 2009, 12(12): 41 -43 .
[2]	. [J]. , 2009, 12(12): 20 -22+77 .
[3]	. [J]. , 2009, 12(12): 23 -25 .
[4]	. [J]. , 2009, 12(12): 48 -51 .
[5]	. [J]. , 2009, 12(12): 26 -28+37 .
[6]	. [J]. , 2009, 12(12): 38 -40 .
[7]	. [J]. , 2009, 12(12): 52 -54+57 .
[8]	. [J]. , 2009, 12(12): 103 -106 .
[9]	. [J]. , 2009, 12(12): 6 -8 .
[10]	PU Liang, ZHANG Xiao-Miao. Design of a Dual Band Printed Antenna for WLAN Applications[J]. , 2009, (12): 1 -2+5 .

电路	未优化电路	已优化电路
数据量/个	159 380	113 212
功耗/mW	157.302 6	110.702 5
确定系数	0.038 62	0.016 69
数学期望	0.334 5	0.241 2
标准差	0.901 2	0.793 5
符合时间分辨率/ns	1.500 6	1.321 3

Sparse Quantization Level Method for Scintillation Pulse Based on Feedback Regulation

RichHTML

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 17

References 17

Related Articles 15

Metrics

Comments

Recommended 10

[1]	LI Na,GAO Bo,XIE Zongfu. Research on Scheduling Method of Layered Heterogeneous Signal Processing Platform [J]. Electronic Science and Technology, 2022, 35(2): 7-13.
[2]	FENG Xianding,WEI Jingtao,WU Zhangyong,QIAN Jie,PU Youshang. Research on Load Forecast of Ball Mill Based on PCA-PSO-SVM [J]. Electronic Science and Technology, 2022, 35(1): 29-34.
[3]	GENG Zhaoqian,ZHU Huming,LI Xuming,CHEN Meiqing,YANG Guipeng. A Review: Radar Signal Processing Based on High Performance Computing [J]. Electronic Science and Technology, 2021, 34(9): 1-6.
[4]	YU Jiawei,HU Haiyang. Energy Consumption Model of Cyber-Physical System Based on Object-Oriented Fuzzy Petri Net [J]. Electronic Science and Technology, 2021, 34(7): 19-25.
[5]	HE Qiang,YANG Qinghui,ZHANG Huaiwu. A Control Method of Power up Bias Sequence of Radio Frequency Amplifier [J]. Electronic Science and Technology, 2021, 34(2): 1-6.
[6]	ZHOU Xiaobo,ZOU Renling,LU Xuhua,WANG Haibin,ZHANG Junxiang. Research Progress of Surface Electromyography Signal Classifier Based on Artificial Neural Network [J]. Electronic Science and Technology, 2021, 34(2): 62-67.
[7]	SUN Huixia,ZHOU Shangnan,ZHOU Ling,DOU Yongmei. Development of Digital Signal Processing Simulation Platform Based on MATLAB GUI [J]. Electronic Science and Technology, 2021, 34(2): 74-78.
[8]	CHEN Guizhou. Research on Substation Integrated Automation Control System Based on DSP [J]. Electronic Science and Technology, 2020, 33(9): 75-78.
[9]	YANG Siqi,CHEN Wei,ZHANG Qingqing,XIE Ye. Fault Diagnosis Method of Transmission Network Based on Rule Reasoning [J]. Electronic Science and Technology, 2019, 32(3): 42-46.
[10]	JI Chuankun,QIAN Junbing. Vector Control System of PMSM Based on Repetitive Synovial Control [J]. Electronic Science and Technology, 2019, 32(1): 52-57.
[11]	DU Baojiang，ZHENG Feifei，LI Chuanlei，MA Dan，WANG Mengfei. Development of CATIA Standard Parts Library [J]. , 2017, 30(9): 34-.
[12]	CHEN Qing,WENG Xufeng. A Robust Image Watermarking Based on Harris Feature Points and Pseudo-Zernike Moments [J]. , 2016, 29(3): 183-.
[13]	ZHANG Jing. The Hardware System Design of A Certain Radar Signal Processing Board [J]. , 2015, 28(6): 147-.
[14]	LI Xiaofeng. Performance Optimization of Web FrontEnd Engineering [J]. , 2015, 28(5): 184-.
[15]	LI Jiancheng,BING Rui,ZHAO Youshi. Study of the Demonstration System of the “Digital Signal Processing” Course Based on GUI [J]. , 2015, 28(4): 76-.