使用 OpenPET 系统对,碳,氧和离子离子束进行内束范围的确定
Jiayao Sun1,2, Takamitsu Masuda1, Hideaki Tashima3
1Department of Accelerator and Medical Physics, Institute for Quantum Medical Science, National Institutes for Quantum Science and Technology (QST), Chiba 263-8555, Japan.
Physics in medicine and biology
|October 20, 2025
概括
这项研究表明,内部PET系统 (OpenPET) 可以准确地确定多离子疗法中的离子束范围. 对,碳,氧和离子的测量达到2毫米的精度,优化了带电粒子治疗.
科学领域:
- 医学物理 医学物理
- 核物理 核物理 核物理
- 辐射疗法 辐射疗法
背景情况:
- 多离子疗法利用,碳,氧和离子束来提高带电粒子疗法的有效性.
- 加速离子的核相互作用产生正子发射核,这些核通过毁灭光子衰变.
研究的目的:
- 通过内部在线PET系统 (OpenPET) 测量的消灭光子来调查离子束范围的准确性.
- 为了比较不同离子物种 (,碳,氧,) 的性能,以确定范围.
主要方法:
- 用,碳,氧和离子离子束对聚甲基甲酸盐幻影进行辐射.
- 使用OpenPET系统测量消灭光子.
- 使用粒子和重离子传输代码系统 (PHITS) 模拟离子束传输和消灭光子产生.
- 通过比较测量和模拟的平面集成消灭光子分布 (PIADs) 来确定光束范围.
- 使用费舍尔信息量化范围确定精度.
主要成果:
- 碳,氧和离子的测量和模拟PIAD之间有很好的一致性;对于离子而言,注意到了差异.
- 对所有四种离子物种的离子束范围的确定精确度在2毫米以内,测量时间超过3分钟.
- 离子为135秒以下的测量时间提供了最高的费舍尔信息 (表明最佳准确性).
- 氧离子为超过135秒的测量时间提供了最高范围的测定精度.
结论:
- 通过OpenPET测量,可以在180秒内准确地确定,碳,氧和离子的离子束范围 (在2毫米内).
- 离子在135秒内提供更高的范围确定精度,而氧离子在更长的测量时间内更准确.
- 这种技术有望提高多离子放射治疗的精度和疗效.
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