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模拟和评估可定制的固定化口罩用于精密放射治疗

Diana Adlienė¹, Antonio Jreije¹, Paulius Griškevičius²

¹Department of Physics, Kaunas University of Technology, Studentu Str. 50, 51368 Kaunas, Lithuania.

|January 28, 2026

概括

新的基于烯丁 styrene (ABS) 的复合材料为头部和部放射治疗固定化面具提供了卓越的机械稳定性. 这些可定制的口罩减少了位移,提高了辐射治疗中的精度和患者舒适度.

科学领域:

材料科学材料科学材料科学
生物医学工程生物医学工程
放射治疗物理物理

背景情况:

精确的患者固定在头部和部 (H&N) 放射治疗中至关重要,用于精确的剂量输送和最大限度地减少健康组织的辐射.
传统的热塑性口罩有其局限性,包括不完美的表面复制,机械弱点,患者不适以及工作流程效率低下.
个性化的CT或MRI扫描可创建更准确的,针对患者的固定化口罩.

研究的目的:

设计和评估可定制的固定化口罩,使用烯丁 styrene (ABS) 基复合材料,增强 bismuth 氧化物 (Bi2O3).
将这些新型ABS/Bi2O3口罩的机械性能与商用热塑性口罩进行比较.
评估在放射治疗中改善固定精度,患者舒适度和可持续性的潜力.

主要方法:

制造和ABS和ABS/Bi2O3复合纤维的拉伸性测试 (5,10,20%重量%).
在临床相关的负载条件下 (部曲,横向曲) 针对患者的虚拟口罩的有限元分析 (FEA).
与两个商业热塑性面罩相比,对机械性能和位移进行了比较.

主要成果:

与商业热塑性塑料 (0.25-0.3 GPa,~7 MPa) 相比,ABS和ABS/Bi2O3复合材料的刚度 (1.7-2.5 GPa) 和屈服强度 (20-25 MPa) 显著更高.
与商业面罩相比,FEA显示ABS面罩的位移明显减少 (1-5mm在2mm厚度下;<1mm在4mm厚度下) (>20mm在横向负载下).
带有强化边缘的混合面具设计进一步提高了刚性,同时优化了材料使用.

结论:

可定制的基于ABS的固定化口罩提供优越的机械稳定性和位移控制,比传统的热塑性塑料.
这些口罩有可能减少规划边缘,提高放射治疗的精度,并提高患者的舒适度.
基于ABS的口罩和Bi2O3复合材料的可回收性支持辐射疗法设备制造中的可持续实践和废物减少.

关键词:

添加剂制造添加剂制造添加剂制造头部和部固定化面具头部和部固定化面具用金属增强的热塑性塑料.建模建模模型是什么辐射疗法辐射疗法

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