从治疗和成像程序的腹部神经母细胞瘤的年轻患者的辐射暴露:一个幻影研究
Michalis Mazonakis1, John Stratakis2, Efrossyni Lyraraki3
1Department of Medical Physics, Faculty of Medicine, University of Crete, P.O. Box 2208, 71003, Iraklion, Crete, Greece. mazonak@uoc.gr.
Physical and engineering sciences in medicine
|July 22, 2025
概括
这项研究评估了接受放射治疗的儿科神经母细胞瘤患者的辐射剂量. 与成人协议相比,专门的儿科圆束CT协议显著降低了辐射暴露.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 儿科瘤学 儿科瘤学
背景情况:
- 年轻患者高风险神经母细胞瘤需要复杂的放射治疗.
- 治疗和成像程序有助于累积辐射剂量.
- 精确的剂量计算对于优化治疗和最大限度地减少毒性至关重要.
研究的目的:
- 计算给患有腹部神经母细胞瘤的儿科患者的辐射剂量,从强度调节放射疗法 (IMRT),体积调节弧线疗法 (VMAT) 和kV圆束CT (CBCT) 来计算.
- 评估专门的儿科CBCT协议在减少辐射剂量的有效性,与标准的成人协议相比.
主要方法:
- 计算式XCAT幻象 (5-15岁) 用于模拟治疗场景.
- 为腹部目标体积生成IMRT和VMAT计划.
- 蒙特卡洛方法模拟了用于剂量计算的不同CBCT协议.
- 剂量-体积组图分析了至关重要器官的剂量和计划目标体积 (PTV).
主要成果:
- IMRT和VMAT计划显示了可比的PTV覆盖率和器官节省.
- 腹部器官的平均剂量在3.6-19.6 Gy之间,胸部器官0.1-2.3 Gy,目标剂量为21.6 Gy.
- 一个专门的儿科CBCT协议减少了辐射剂量超过五倍,与修改成人的协议相比.
结论:
- 为儿科患者量身定制的CBCT方案显著降低了神经母细胞瘤治疗期间的辐射暴露.
- 优化成像协议对于尽量减少儿科放射治疗中的累积辐射剂量至关重要.
- 这种方法提高了患者的安全性,并可能减少长期副作用.
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