数学模型与微剂量对称运动模型相结合,用于瘤体积计算,用于体内立体辐射疗法
Hisashi Nakano1,2, Takehiro Shiinoki3, Satoshi Tanabe4
1Department of Radiation Oncology, Niigata University Medical and Dental Hospital, 1-757 Asahimachi-dori, Chuo-ku, Niigata-shi, Niigata, Japan. nakanoh@med.niigata-u.ac.jp.
Scientific reports
|July 6, 2023
概括
结合普通微分方程和微剂量对称动力学的新数学模型准确地预测了立体体辐射疗法 (SBRT) 对非小细胞肺癌 (NSCLC) 瘤的影响. 与传统方法相比,这种模型可以更好地预测瘤细胞死亡率.
科学领域:
- 医学物理 医学物理
- 计算生物学 计算生物学
- 在瘤学瘤学.
背景情况:
- 立体体辐射疗法 (SBRT) 是非小细胞肺癌 (NSCLC) 的关键治疗方法.
- 预测SBRT的瘤细胞致命效应需要复杂的建模,以解释瘤动态和辐射动力学.
- 现有的模型可能无法完全捕捉瘤细胞活动,剂量输送和辐射反应之间的复杂相互作用.
研究的目的:
- 开发和验证一个新的数学模型,整合普通微分方程 (ODE) 和微剂量对称运动模型 (MKM) 来预测SBRT对NSCLC的致命效应.
- 将ODE-MKM组合模型的预测准确度与传统的线性二次模型 (LQM) 与多元组件数学模型 (MCM) 相比较.
- 为了研究瘤细胞活动比率 (活跃与静止) 和分数间剂量递送时间 (t_inter) 对SBRT有效性的影响.
主要方法:
- 一个包含ODEs的多元组件数学模型 (MCM) 用于模拟NSCLC瘤生长 (A549和H460细胞系).
- 微剂量测量运动模型 (MKM) 用于评估SBRT对瘤细胞的影响,使用处方剂量为48 Gy/4分数和54 Gy/3分数.
- 辐射效率值 (REV) 被定义为瘤体积辐射后与辐射前体积的比率;分析了LQM与MKM,活跃/静止瘤比率和t_inter对REV的影响.
主要成果:
- 结合MKM和MCM方法显著降低了REV在48 Gy/4分数,相比LQM和MCM的组合.
- 发现活跃瘤细胞和延长的分数间时间 (t_inter) 的比率降低了A549和H460细胞系的REV.
- 该模型在SBRT下成功评估了瘤体积变化,使用大剂量的分量和不同的剂量递送时间.
结论:
- 与LQM-MCM方法相比,拟议的ODE-MKM模型更准确地预测了SBRT在NSCLC中的瘤致命效应.
- 瘤细胞增殖动力学和剂量递送时间是影响NSCLCSBRT疗效的关键因素.
- 这种综合建模框架为优化SBRT治疗计划和预测NSCLC患者的结果提供了宝贵的工具.
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