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Updated: Jan 15, 2026

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对于双端读出TOF-DOI PET检测器的时间步行和时间转移校正方法

Haibo Wang¹, Jiahao Xie¹, Jinyi Qi¹

¹Department of Biomedical Engineering, University of California at Davis, Davis, CA 95616 USA.

IEEE transactions on radiation and plasma medical sciences

|October 6, 2025

概括

这项研究引入了一种新的校正方法,用于双端读出定子发射断层扫描 (PET) 探测器中的时间步行和时间转移. 该技术显著提高了巧合时间分辨率,提高了PET成像性能.

科学领域:

医疗成像医学成像
核物理核物理核物理
仪器化仪器化仪器化

背景情况:

定子发射断层扫描 (PET) 探测器面临时间不准确性,如时间行走和时间转移.
这些问题源于尖端的分辨器和厚晶体中的相互作用深度 (DOI) 效应.
精确的定时对于高分辨率PET成像至关重要.

研究的目的:

开发和评估双端读出PET检测器中时间行走和时间转移的综合校正方法.
为了提高PET系统的巧合时间分辨率 (CTR).
提高PET扫描仪的整体性能和图像质量.

主要方法:

提出了一种新的结合时间步行和时间转移校正算法.
双端读出PET探测器是使用光倍增器 (SiPM) 阵列和LYSO晶体构建的.
事件能量与检测到的时间差异之间的关系被用于校正.
应用了一个能量窗口 (400-650 keV) 来选择有效的事件.

主要成果:

提出的方法有效地纠正了时间行走和时间转移.
巧合时间分辨率从260.7 ± 1.0 psi提高到229.4 ± 1.0 ps.
结果表明,PET探测器的计时精度显著提高.

结论:

开发的校正方法对于双端读出PET检测器是有效的.
这种技术提供了一种可行的解决方案,以提高PET成像中的定时分辨率.
这些发现有助于推进高性能PET扫描仪技术的发展.

关键词:

在 DOI DOI 中.双端的读取输出在这里,PET是PET.时间步行纠正时间步行纠正时间转移纠正时间转移纠正

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