进行基准测试的质子RBE模型
Lydia L Gardner1, John D O'Connor2, Stephen J McMahon1
1Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, United Kingdom.
Physics in medicine and biology
|March 12, 2024
概括
对13种质子疗法相对生物有效性 (RBE) 模型的基准测试显示,由于潜在假设,存在重大分歧. 实验数据的差错估计导致了过度拟合和不可靠的预测,突出了强有力的统计验证的需要.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 放射生物学的放射生物学
背景情况:
- 准确预测质子相对生物有效性 (RBE) 对于优化质子疗法至关重要.
- 目前的现象学RBE模型由于不同的假设和合适的数据集而表现出显著的差异.
研究的目的:
- 通过使用共同的数据集和拟合技术,对13个RBE模型进行基准测试.
- 通过交叉验证来评估模型的通用性和稳定性.
- 评估数据权重和生物终点选择对模型性能的影响.
主要方法:
- 将13个RBE模型配合到一个全面的质子RBE数据集中.
- 使用交叉验证方法来评估模型的通用性.
- 调查加权适应和单个与多个生物终点的影响.
主要成果:
- 共同的数据集适配减少了预测差异,但仍然存在重大分歧.
- 权重交叉验证匹配表现不佳,表明低估的实验不确定性和过度装配.
- 最简单的线性LET依赖模型在单个生存水平方面表现出色,而复杂的组织依赖模型在多个水平方面表现更好.
结论:
- 剂量反应参数的错误估计很差,这显著影响了RBE模型的合适性.
- 不同质的数据集和固有的模型复杂性挑战了准确的RBE预测.
- 强大的统计验证对于在质子疗法中开发可靠的RBE模型至关重要.
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