胰腺癌的碳离子放射治疗优化技术:考虑肠道气体变化的影响

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Updated: Sep 10, 2025

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Chaebeom Sheen¹, Sunghyun Lee^2,3,4,5, Bitbyeol Kim^2,3

¹Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Korea (Republic of).

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概括

通过解决肠道空气变化, 密度覆盖改善胰腺癌的碳放射治疗. 推采用第三种模式,使剂量均,特别是当瘤靠近胃肠道时.

科学领域:

辐射瘤学
医学物理
癌症学

背景情况:

在胰腺癌的碳放射治疗中,肠道空气的变化造成了显著的剂量不确定性.
本研究研究了一种密度覆盖技术,以提高剂量准确性.

研究的目的:

评估不同密度覆盖模式在减轻胰腺癌碳放射治疗期间肠道空气变化的剂量不确定性.

主要方法:

从8名经受立体性废除放射治疗的局部晚期胰腺癌患者的CT数据进行了回顾性分析.
四个密度覆盖模式 (0,1,2,3) 的比较,模拟使用 55.2 GyE 在 12 分.
目标覆盖率,同质性指数和处于风险剂量的器官的评估.

主要成果:

模式2提供了最好的临床瘤体积覆盖率和最少的覆盖率损失.
与1号和3号模式相比,2号模式显示侧面光束的同质性较差,胃肠道剂量增加.
模式3提供了覆盖范围和同质性之间的平衡.

结论:

在胰腺癌放射治疗中控制肠道空气变化至关重要.
推采用3型密度超标来达到更均的剂量,特别是在与胃肠道相邻的瘤中.

关键词:

空气密度重置优化局部晚期的胰腺癌颗粒疗法强有力的治疗计划

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