一个临床前全数字正子辐射粒子追踪系统的性能评估
Yang Liu1, Kun Li2,3, Ruolan Liu4
1MOE Key Laboratory for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
Physics in medicine and biology
|October 13, 2025
概括
这项研究表明,重新配置的正电子发射断层扫描系统能够准确地在体内跟踪细胞和粒子. 该系统达到毫米以下的精度,支持先进的生物医学研究.
科学领域:
- 生物医学工程 生物医学工程
- 核医学是一种核医学.
- 医疗成像医学成像
背景情况:
- 对体内研究,包括深层组织中的细胞跟踪,正子发射粒子跟踪 (PEPT) 是至关重要的.
- 现有的系统在实际的体内条件下,在计数速度能力,灵敏度和空间精度方面面临局限.
研究的目的:
- 评估一个重新配置的,全数字的小动物PET系统,用于体内PEPT应用.
- 为了确定系统是否符合计数率容量,灵敏度和亚毫米空间跟踪精度的要求.
主要方法:
- 在各种条件下使用18F点源评估系统性能.
- 用衰变和轴向扫描测量计数率和灵敏度.
- 对静态和动态 (移动) 源进行定位精度评估,并进行参数调整.
主要成果:
- 线性计数速率行为保持在~25 MBq;处理的提示速率高达3.4 MHz.
- 峰值轴敏度为3.45%;静态定位精度~0.6mm跨100mm,在屏蔽的情况下<1mm.
- 动态跟踪实现了0.62毫米 (144毫米/秒) 和0.64毫米 (425毫米/秒) 的精度,并调整了参数.
结论:
- 评估的PET系统在体内提供了毫米以下的定位精度和准确性,即使有衰减和运动.
- 结果支持其用于体内细胞和粒子跟踪.
- 提供了基于扫描条件优化PEPT参数的实用指南.
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