修改的X射线管用于高剂量率FLASH放射治疗研究FLASH放射治疗研究
Liwen Cui1, Jiaxu Guo1, Yi Lu1
1School of Life Science and Technology, Xidian University, Xi'an, Shaanxi, China.
Medical physics
|February 13, 2026
概括
改造的X射线管提供了一个具有成本效益的FLASH放射治疗 (FLASH-RT) 平台. 这项研究表明,提高了剂量速率和扩大了光束端口,使FLASH-RT研究更容易获得.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 生物物理学的生物物理.
背景情况:
- 传统辐射疗法 (CONV-RT) 面临广泛采用FLASH辐射疗法 (FLASH-RT) 的局限性,原因是依赖昂贵的粒子加速器.
- 千伏 (kV) 的X射线管为FLASH-RT研究和应用提供了更容易获得和更具成本效益的替代方案.
研究的目的:
- 调查修改旋转阳极X射线管的可行性,以实现FLASH放射治疗研究的超高剂量率.
- 提高剂量速率的能力,并扩大kVX射线管的束出口口,以改进实验设置.
主要方法:
- 一个高容量的X射线管经过修改,缩短了源到表面的距离 (SSD) 并扩大了光束出口.
- 用固体水幻影和放射性色膜进行剂量速率测量,以评估修改前后的性能.
主要成果:
- 经过修改的X射线管在29.5毫米的SSD上实现了200 Gy/s的最大表面剂量率,增加了1.6倍.
- 扩展梁出口口的尺寸为127毫米×96毫米,方便更大的样品放置.
- 闪光剂量超过40 Gy/s的速度在固体水中深度高达25毫米时实现.
结论:
- 对旋转阳极X射线管的住房修改有效地提高了FLASH实验的超高剂量速率传递.
- 这种适应的kV X射线管配置为基于实验室的FLASH放射治疗研究提供了一个可访问的平台,尽管存在诸如剂量均性和管寿命等挑战.
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