γ射线能量、码板与探测器厚度对编码成像视野范围的影响研究

辐射防护 ›› 2025, Vol. 45 ›› Issue (6): 576-585.

γ射线能量、码板与探测器厚度对编码成像视野范围的影响研究

王一霖¹, 梁秀佐^2,3,4,5, 刘新萌^2,3,4, 余小东¹, 高歌^2,3,4, 杨曜^2,3,4,5, 帅磊^2,3,4,5

1.山东核电有限公司,山东烟台 265116;
2.济南中科核技术研究院,济南 250131;
3.山东省先进核能及核能综合利用重点实验室,济南 250131;
4.数字化辐射探测及辐射防护山东省工程研究中心,济南 250131;
5.中国科学院高能物理研究所,北京 100049

收稿日期:2025-05-15 出版日期:2025-11-20 发布日期:2026-01-14
通讯作者: 帅磊。E-mail: shuail@ihep.ac.cn
作者简介:王一霖(1990—),男,2012年毕业于东北电力大学核工程与核技术专业,工程师。E-mail: wangyilin@spic.com.cn
基金资助:
山东省自然科学基金资助项目(ZR2022QA086)。

Investigation of the effects of gamma-ray energy, coded aperture mask and detector thickness on the fully coded field of view

WANG Yilin¹, LIANG Xiuzuo^2,3,4,5, LIU Xinmeng^2,3,4, YU Xiaodong¹, GAO Ge^2,3,4, YANG Yao^2,3,4,5, SHUAI Lei^2,3,4,5

1. Shandong Nuclear Power Company Ltd., Shandong Yantai 265116;
2. Jinan Laboratory of Applied Nuclear Science, Jinan 250131;
3. Shandong Province Key Laboratory of Advanced Nuclear Energy and Non-electricity Application of Nuclear Energy,Jinan 250131;
4. Digital Radiation Detection and Radiation Protection Shandong Engineering Research Center, Jinan 250131;
5. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049

Received:2025-05-15 Online:2025-11-20 Published:2026-01-14

摘要/Abstract

摘要： 在编码孔径成像系统中,视野范围由编码板与位置灵敏探测器的几何关系决定。通过控制变量法系统揭示了编码板厚度及材料、探测器厚度及材料、射线能量等物理参数与成像系统的全编码视野范围的关系,通过引入编码板与探测器的等效厚度概念修正传统计算方式中探测器与码板的距离变量,最终给出相应的经验参数公式。模拟和实验结果均验证了所提经验公式的有效性,其能够更加准确地界定编码孔径成像系统的全编码视野范围,可作为编码孔径成像系统中视野刻度设计的重要参考。

关键词: 编码成像视野, 码板厚度, 探测器厚度, 蒙特卡罗模拟, 编码孔径

Abstract: In coded aperture imaging systems, the field of view (FOV) is conventionally determined by the geometric relationship between the coded aperture mask and the position-sensitive detector. However, the influence mechanism of critical physical parameters—including the thickness and material properties of both the mask and detector, as well as the radiation energy—on the fully coded field of view (FCFOV) has not been systematically investigated. This study employs a controlled-variable approach to systematically elucidate the relationship among these parameters (mask thickness/material, detector thickness/material, and energy) and the FCFOV. By introducing the concept of equivalent thickness to revise the conventional geometric model (which relies solely on mask-detector distance), we propose an empirical parameterized formula for FCFOV calculation, representing the first such model of its kind internationally. Both simulations and experimental results validate the effectiveness of the formula, demonstrating its superior accuracy in defining the FCFOV boundaries compared to traditional methods. These research findings provide a important reference for future FOV calibration and system design in coded aperture imaging applications.

Key words: coded imaging FOV, mask thickness, detector thickness, monte carlo simulation, coded aperture

中图分类号:

TL81

王一霖, 梁秀佐, 刘新萌, 余小东, 高歌, 杨曜, 帅磊. γ射线能量、码板与探测器厚度对编码成像视野范围的影响研究[J]. 辐射防护, 2025, 45(6): 576-585.

WANG Yilin, LIANG Xiuzuo, LIU Xinmeng, YU Xiaodong, GAO Ge, YANG Yao, SHUAI Lei. Investigation of the effects of gamma-ray energy, coded aperture mask and detector thickness on the fully coded field of view[J]. RADIATION PROTECTION, 2025, 45(6): 576-585.

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