前列腺癌强度调节放射治疗的治疗规划参数及其剂量计影响:使用摩纳哥TPS的研究
Florentina Larisa Coc1,2, Loredana G Marcu3,4
1Faculty of Physics, West University of Timisoara, Timisoara, 300223, Romania.
Radiation and environmental biophysics
|February 10, 2026
概括
优化前列腺癌放射治疗包括平衡治疗计划质量和治疗效率. 最小细分宽度为1.0厘米,流动性平滑度为中高,为剂量测量结果和高效的治疗提供最佳妥协.
科学领域:
- 辐射瘤学 辐射瘤学
- 医学物理 医学物理
- 放射治疗规划 放射治疗规划
背景情况:
- 精确的放射治疗计划对于有效的前列腺癌治疗至关重要.
- 卷度调节弧线疗法 (VMAT) 和强度调节辐射疗法 (IMRT) 是需要仔细参数优化的先进技术.
- 了解规划参数对剂量测量结果的影响对于提高治疗疗效和患者安全至关重要.
研究的目的:
- 评估最小细分宽度 (MSW) 和流动平滑对前列腺癌放射治疗中剂量测量结果的影响.
- 为了确定最佳的治疗计划解决方案,平衡计划质量,交付准确性和效率.
- 在VMAT/IMRT规划中比较不同的MSW值 (0.5,1.0,1.5,2.0厘米) 和流动平滑水平 (低,中,高).
主要方法:
- 针对20名前列腺癌患者,使用不同的MSW生成了四个VMAT/IMRT计划.
- 对于所有平面,在"高"处应用流动光滑,在"低"和"中"处重新优化,MSW=1.0厘米.
- 分析了剂量计结果,包括瘤覆盖范围,危险器官 (OAR) 节省,监测单位 (MU),控制点 (CP) 和交付时间 (DT).
主要成果:
- 较小的MSW (0.5厘米) 改善了瘤覆盖率和OAR节省,但显著增加了MU,CP和DT.
- 减少流动光滑显著降低了MU和DT,改善了马传递率 (GPR).
- 一个1.0厘米的MSW与中高流动性平滑显示了计划质量和交付效率之间有利的平衡,而不会影响剂量测量结果.
结论:
- 在所有测试的细分宽度和流动性平滑水平上实现了临床上可接受的剂量分布.
- 前列腺癌放射治疗的最佳规划策略涉及1.0厘米的MSW与中高流动性光滑相结合.
- 这种方法在计划质量,输送准确性和效率之间提供了平衡,这对于有效和实用的放射治疗输送至关重要.
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