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对各种线性加速器的强度调节辐射治疗因子的评估

Jin Jegal^1,2, Min-Jae Park³, Sang Hoon Jung⁴

¹Department of Radiation Oncology, Seoul National University Hospital, Seoul, Republic of Korea.

Journal of applied clinical medical physics

|August 21, 2025

概括

用实际处理数据计算了对辐射屏蔽至关重要的IMRT系数. 虽然Halcyon的因子比TrueBeam和VitalBeam更高,但不够高以至于需要最高推值.

科学领域:

医学物理
辐射瘤学
辐射屏蔽

背景情况:

强度调节放射治疗 (IMRT) 因素对于计算辐射屏蔽至关重要.
目前对IMRT因子 (2-10) 的建议是广泛的,复杂的实际屏蔽设计.
需要准确的IMRT因子来有效地确定二次屏障厚度.

研究的目的:

计算和比较Halcyon,VitalBeam和TrueBeam线性加速器的IMRT系数.
提供基于实际监测单位 (MU) 的准确数据,以改进辐射屏蔽计算.
评估推的IMRT因子范围的临床相关性.

主要方法:

收集了三家韩国医院的治疗数据 (2022年3月 - 2023年12月).
使用ARIA统一报告应用程序提取的数据.
通过分析不同LINAC的固定门IMRT,VMAT和立体压缩放射治疗技术的实际MU计算IMRT因子.

主要成果:

对VMAT的平均IMRT因子:Halcyon (2.82±0.32),TrueBeam (2.61±0.31),VitalBeam (2.22±0.21).
哈尔的VMAT IMRT因子比TrueBeam高8%,比VitalBeam高27%.
在Halcyon上,固定式IMRT的IMRT系数大约是VMAT技术的1.9倍.

结论:

计算的IMRT因子为辐射屏蔽设计提供了临床相关的数据.
这些发现可以提高确定二次屏障厚度的实用性和效率.
这项研究为基于实际临床使用的辐射屏蔽提供了更准确的基础.

关键词:

IMRT系数这里是 LINAC 在VMAT

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