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基于邻近晶体光共享的单体晶体探测器的性能研究,具有双端读出

Zhuoran Wang^1,2,3,4, Xianchao Huang^1,3,4, Daowu Li^1,3,4

¹Beijing Engineering Research Centre of Radiographic Techniques and Equipment, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China.

Physics in medicine and biology

|July 3, 2025

概括

这项研究引入了用于正子发射断层扫描 (PET) 的双端读出探测器,该探测器通过使用光共享来改善单体晶体的边缘空间分辨率. 这种方法显著提高了探测器的性能,特别是用于小动物成像.

科学领域:

核仪器仪表核仪器仪表核仪器仪表
医学成像物理医学成像物理

背景情况:

单晶晶体探测器在正电子发射断层扫描 (PET) 中提供高检测效率和相互作用深度分辨率.
单体探测器中的边缘效应降低了性能,并降低了探测器边界的定位精度.

研究的目的:

提出和评估一个双端读出PET检测器设计.
为了减轻边缘效应并改善单体晶体探测器中的空间分辨率,使用邻近的晶体光共享.

主要方法:

使用了四个40x40x20毫米3的LYSO晶体,与高折射率光学接剂结合在一起.
采用双端读数系统与邻近的晶体光共享.
应用了重心方法与值降低和2D定位的联合响应计算.

主要成果:

具有光共享的双端读出探测器实现了与边缘的中心区域 (0.76毫米) 相当的空间分辨率.
这种方法在20毫米厚的晶体探测器中显著减轻了边缘效应.
一个具有光共享的单端读出探测器实现了0.99毫米的空间分辨率.

结论:

使用光共享的双端读出探测器有效地克服了单体晶体探测器中的边缘效应限制.
这种设计在厚的晶体中实现了高空间分辨率,对小动物PET有利.
提出了一个有前途的探测器方案,用于推进高灵敏度,高空间分辨率的PET系统.

关键词:

双端读取输出双端读取输出一个单质的水晶.邻近的晶体光共享共享.小动物PET小动物PET 降低门值的情况.

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