| 正电子发射断层成像系统中数字化多通道时间数字转换研究 |
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| 引用本文： | 王培林,李道武,丰宝桐,帅磊,孙芸华,胡婷婷,魏书军,黄先超,廖燕飞,柴培,贠明凯,章志明,魏龙.正电子发射断层成像系统中数字化多通道时间数字转换研究[J].原子能科学技术,2011,45(5):637-640. |
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| 作者姓名： | 王培林 李道武 丰宝桐 帅磊 孙芸华 胡婷婷 魏书军 黄先超 廖燕飞 柴培 贠明凯 章志明 魏龙 |
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| 作者单位： | 1.中国科学院 ;高能物理研究所 ;核分析技术重点实验室，北京100049；2.北京市射线成像技术与装备工程技术研究中心，北京100049；3.中国科学院 ;研究生院，北京100049 |
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| 基金项目： | 国家自然科学基金，中国科学院知识创新工程重要方向项目资助 |
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| 摘 要： | 利用现场可编程门阵列（FPGA）内部延迟链，对正电子发射断层成像（PET）系统中高精度时间数字转换（TDC）进行研究。采用粗时间和精细时间相结合的方式测量时间，粗时间利用时钟计数器实现，精细时间利用FPGA延迟链实现。测试时间测量的微分非线性和积分非线性，并在双探头PET实验平台上通过时间符合，对系统总体时间分辨进行测试。实验结果表明，TDC时间分辨达79.3ps，微分非线性为-0.2LSB/0.2LSB，积分非线性为-0.2LSB/0.3LSB，双探头PET实验系统总体时间分辨达2.1ns，可满足PET系统对时间测量的要求。
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| 关 键 词： | 正电子发射断层成像 时间数字转换 FPGA |
Multi-channel Digitized Time-to-Digital Converter of Positron Emission Tomography System |
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| WANG Pei-lin,LI Dao-wu,FENG Bao-tong,SHUAI Lei,SUN Yun-hua,HU Ting-ting,WEI Shu-jun,HUANG Xian-chao,LIAO Yan-fei,CHAI Pei,YUN Ming-kai,ZHANG Zhi-ming,WEI Long.Multi-channel Digitized Time-to-Digital Converter of Positron Emission Tomography System[J].Atomic Energy Science and Technology,2011,45(5):637-640. |
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| Authors: | WANG Pei-lin LI Dao-wu FENG Bao-tong SHUAI Lei SUN Yun-hua HU Ting-ting WEI Shu-jun HUANG Xian-chao LIAO Yan-fei CHAI Pei YUN Ming-kai ZHANG Zhi-ming WEI Long |
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| Affiliation: | 1.Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;2.Beijing Engineering Research Center of Radiographic Techniques and Equipment, Beijing 100049, China; 3.Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | High precision time-to-digital converter(TDC) in positron emission tomography(PET) system was studied with the delay chains in field-programmable-gate-array(FPGA).Time measurement includes two parts,coarse time measurement implemented by a clock-driven counter,fine time measurement by delay chains in FPGA.Differential nonlinearity(DNL) and integral nonlinearity(INL) were tested,and also,total time resolution of the double-detector PET experimental platform was measured by time coincidence.The results demons... |
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| Keywords: | positron emission tomography time-to-digital converter field-programmable-gate-array |
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