Monte Carlo simulation for performance evaluation of detector model with a monolithic LaBr3(Ce) crystal and SiPM array for γ radiation imaging
Monte Carlo simulation for performance evaluation of detector model with a monolithic LaBr3(Ce) crystal and SiPM array for γ radiation imaging
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蒙特卡罗模拟用于评估具有单片 LaBr3(Ce) 晶体和 SiPM 阵列的 γ 辐射成像探测器模型的性能
DOI：
10.1007/s41365-022-01081-3
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发表时间：
2022-08
期刊：
影响因子：
--
通讯作者：
Jing Ning
中科院分区：
文献类型：
--
作者：
Wei Lu;Lei Wang;Yong Yuan;Ting Zhang;Ge Tang;Ming-Zhe Liu;Xian-Guo Tuo;Jing Ning
近年来，LaBr3(Ce)晶体和硅光电倍增管(SiPM)在辐射成像中的应用越来越广泛。本研究在GEANT4平台上建立了用于γ辐射成像的单块LaBr3(Ce)晶体和SiPM阵列探测器模型。探测器模型中包含的光学过程由LaBr3：5%Ce晶体的发射光谱、闪烁产额、本征分辨率以及SiPM阵列的探测效率等关键参数定义。模拟和评价了探测器模型对57Co水淹场辐照的响应。探测器模型产生的辐射图像表现出与物理探测器采集的图像非常接近的压缩效果。模拟探测器的空间分辨率接近于物理实验的空间分辨率。建立了没有光学过程的探测器模型，并与使用光学过程的探测器进行了比较。两者都用于近场改进型均匀冗余阵列(Mura)成像系统，以获取成像系统视场中心的57Co点源和环源的图像。对两种探测器模型重建的图像的空间分辨率和信噪比进行了测定和比较。与没有光学过程的探测器模型相比，虽然所提出的探测器模型的图像的信噪比略低，伪影更多，但与真实物理实验中获得的图像的重建版本更一致。结果表明，该探测器模型可用于γ辐射成像探测器的设计和成像算法的开发，大大缩短了研制时间，降低了成本。
In recent years, LaBr3(Ce) crystals and silicon photomultipliers (SiPMs) have been increasingly used in radiation imaging. This study involved the establishment of a detector model with a monolithic LaBr3(Ce) crystal and SiPM array for γ-radiation imaging on the GEANT4 platform. The optical process included in the detector model was defined by key parameters, such as the emission spectrum, scintillation yield, and intrinsic resolution of the LaBr3:5% Ce crystal, as well as the detection efficiency of the SiPM array. The response of the detector model to 57Co flooded field irradiation was simulated and evaluated. The radiation images generated by the detector model exhibited a compression effect that was very close to that on images acquired by the physical detector. The spatial resolution of the simulated detector closely approximates that of the physical experiment. A detector model without the optical process was also established for comparison with a detector using the optical process. Both were used in a near-field modified uniform redundant array (MURA) imaging system to acquire images of a point source and a ring source of 57Co at the center of the field-of-view of the imaging system. The spatial resolution and signal-to-noise ratio of the images that were reconstructed using the two detector models were determined and compared. Compared with the detector model without optical processes, although the images from the proposed detector model have slightly inferior signal-to-noise ratios and more artifacts, they are more consistent with the reconstructed versions of images acquired in real physical experiments. The results confirm that the detector model can be used to design a γ-radiation imaging detector and to develop an imaging algorithm that can significantly shorten the development time and reduce the cost.
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DOI：
10.4028/www.scientific.net/amm.336-338.373
发表时间：
2013-07
期刊：
Applied Mechanics and Materials
影响因子：
--
作者：
Cuilan Zhao;Y. Li;Li Chen;C. Yuan;Y. Qi
通讯作者：
Cuilan Zhao;Y. Li;Li Chen;C. Yuan;Y. Qi
DOI：
10.1109/nssmic.1997.672573
发表时间：
1997-11
期刊：
1997 IEEE Nuclear Science Symposium Conference Record
影响因子：
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作者：
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通讯作者：
R. Wojcik;S. Majewski;B. Kross;D. Steinbach;A. Weisenberger
DOI：
10.1016/j.nima.2012.10.060
发表时间：
2013-02
影响因子：
1.4
作者：
R. Scafè;R. Pani;R. Pellegrini;M. Cinti;P. Bennati;S. Meo
通讯作者：
R. Scafè;R. Pani;R. Pellegrini;M. Cinti;P. Bennati;S. Meo
DOI：
10.1016/j.apradiso.2019.108858
发表时间：
2019-08
期刊：
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine
影响因子：
--
作者：
Lei Wang;Yi-Ni Wu;Jie Pan;Jing Ning;Xin Liu;Xue-Lan Yuan;Ting Zhang;W. Lu;Xia Tuo
通讯作者：
Lei Wang;Yi-Ni Wu;Jie Pan;Jing Ning;Xin Liu;Xue-Lan Yuan;Ting Zhang;W. Lu;Xia Tuo
影响因子：
1.8
作者：
Glodo, J;Moses, WW;Shah, KS
通讯作者：
Shah, KS