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通过MRI对液体中质子束辐射效应的直接可视化

Sebastian Gantz^1,2, Leonhard Karsch^1,2, Jörg Pawelke^1,2

¹OncoRay-National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Helmholtz-Zentrum Dresden-Rossendorf, 01309 Dresden, Germany.

Proceedings of the National Academy of Sciences of the United States of America

|May 30, 2023

概括

在线MRI现在可以在癌症治疗期间可视化质子束,揭示它们的范围以提高准精度. 这一突破通过减少健康组织暴露,提高了放射治疗的安全性,并有助于先进的质子疗法系统的质量保证.

科学领域:

医学物理医学物理
放射治疗技术放射治疗技术
磁共振成像是一种磁共振成像技术.

背景情况:

与光子束相比,质子束疗法提供了优越的剂量沉积,具有有限的范围,最大限度地减少了对健康组织的辐射.
目前对实时质子束范围监测的局限性需要安全边缘,从而影响处理精度.
精确确定质子束范围对于最大限度地提高治疗疗效和最大限度地减少癌症患者的副作用至关重要.

研究的目的:

调查使用在线磁共振成像 (MRI) 来可视化质子束并确定其在照射期间的范围的可行性.
探索光束参数 (能量,电流) 和它们的MRI检测信号之间的关系.
评估该技术在磁共振集成质子疗法 (MR-IP) 质量保证方面的潜力.

主要方法:

质子束被辐射到充满液体的幻影中.
在线MRI被用于实时可视化质子束路径和范围.
实验进行了变化的质子束能量和电流.

主要成果:

在线MRI成功地可视化了幽灵中的质子束.
观察到MRI信号对质子束能量和电流的明显依赖.
核磁共振成像允许确定质子束的射程.

结论:

在线MRI是一种可行的方法,用于可视化质子束并测量辐射期间的射程.
这种技术可以为MR-IP系统的实时质量保证提供关键信息.
对MRI可检测的光束特征的进一步研究有望提高质子疗法的精度和安全性.

关键词:

这就是为什么MRI是MRI.梁可视化梁可视化癌症的辐射治疗治疗.质子束疗法是一种质子束疗法.

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