大型客体光子计数成像技术的发展与挑战  

Development and Challenge of Large Container Photon-counting Imaging Technology

作　　者：张华夏 吴志芳[1,2] ZHANG Huaxia;WU Zhifang(Institute of Nuclear Energy and New Energy Technology,Tsinghua University,Beijing 100084,China;Beijing Key Laboratory on Nuclear Detection&Measurement Technology,Beijing 100084,China)

机构地区：[1]清华大学核能与新能源技术研究院,北京100084 [2]核检测技术北京市重点实验室,北京100084

出　　处：《同位素》2023年第4期490-497,共8页Journal of Isotopes

摘　　要：具有光子计数能力的探测器给辐射成像领域带来了技术革新,具有巨大的应用潜力。光子计数探测器凭借其能量分辨能力将有助于提高辐射图像质量、降低辐射剂量、提高检测效率。目前,光子计数成像技术在医学诊断和行包安检等低能领域已有广泛和深入的研究,比如在能谱CT、乳腺检查、PET等领域诞生了许多成果,但是在集装箱检测及车辆安检等大型客体检测的中高能(MeV)领域研究较少,还需进一步克服技术上的困难,以达到中高能射线和高计数率条件的应用要求。本研究重点介绍了光子计数成像技术的特征优势、在X/γ射线医学诊断、安全检查辐射成像系统中的研究现状及面临的挑战,分析了其在大型客体检测中的应用现状和需要进一步突破的技术难点。The photon-counting detectors with great application potential,have brought technological innovation to radiation imaging fields.With energy resolving capability,photon-counting detectors will help to enhance radiation image quality,lower radiation dose and increase detection effectiveness.Nowadays,low-energy detection fields including medical diagnostics and luggage inspection have seen extensive and in-depth research on photon-counting imaging technologies.For instance,numerous advancements have appeared in energy spectrum CT,breast inspection,PET,etc.There are,however,not many investigations on photon-counting detectors for the detection of medium and high energy(MeV)rays.To meet the demands of detecting signals with medium to high energy and with high saturation count rate,further technical problem must be solved.This paper primarily introduces photon-counting imaging technology in terms of its features,advantages,latest research on X/γray imaging systems for medical and security use,and challenges it faced.In addition,its application status and technical difficulties that need to be broken through in large container inspection area are analyzed.

关 键 词：光子计数探测器 辐射成像 大型客体检测 饱和计数率 

分 类 号：TL81[核科学技术—核技术及应用]