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用线性博尔兹曼运输方程算法计算剂量的皮肤结构的最佳划定在放射治疗治疗规划中

Keisuke Hamada^1,2, Toshioh Fujibuchi³, Hiroyuki Arakawa³

¹Department of Radiological Technology, National Hospital Organization Kagoshima Medical Center, 8-1 Shiroyama-cho, Kagoshima, 892-0853, Japan. hamada.keisuke.we@mail.hosp.go.jp.

Radiological physics and technology

|September 9, 2024

概括

将皮肤环结构放置在接受体积调节弧线治疗的头癌患者中,提高了皮肤剂量计算的准确性. 皮肤B结构实现剂量精度在2%以内,确保不会对深部器官产生影响.

科学领域:

医学物理医学物理
辐射瘤学辐射瘤学

背景情况:

精确的皮肤剂量计算在放射治疗中至关重要,特别是在用体积调节弧线疗法 (VMAT) 治疗的头癌中.
使用Acuros XB (AXB) 算法来计算剂量,但其在皮肤表面的精度需要验证.

研究的目的:

用Acuros XB算法评估新型皮肤环结构在提高皮肤剂量计算精度方面的有效性.
为了比较不同皮肤环位置 (皮肤A和皮肤B) 与Gafchromic EBT3膜测量的精度.

主要方法:

在治疗计划系统中,在皮肤以下2毫米 (皮肤A) 和皮肤上方/下方1毫米 (皮肤B) 实现了皮肤环结构.
这些结构在烯酸圆柱形和人形幻影上进行了测试,结果与Gafchromic EBT3膜 (EBT3) 相比.
在幻影研究和两名头癌患者中,分析了皮肤A和皮肤B之间的剂量差异.

主要成果:

皮肤A和皮肤B之间的最大剂量差异在圆柱形幻影中约为12%,在人形幻影中约为2%.
皮肤A和皮肤B之间的患者剂量差异分别为患者1和患者2的9.2%和8.2%.
皮肤B显示皮肤剂量计算精度在2%以内,而不会影响深部器官剂量.

结论:

皮肤B结构放置显著提高了头部和部VMAT皮肤剂量计算的准确性.
该方法为皮肤剂量评估提供了可靠和准确的方法,对于优化放射治疗至关重要.
这些发现表明,皮肤B是一种适合用于临床实践中精确皮肤剂量评估的结构.

关键词:

阿库罗斯XB公司头部和部的情况.皮肤环结构结构皮肤环结构皮肤表面的剂量.卷度调制弧形疗法是一种体积调制的弧形疗法.

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