双边 (平行相反) 延长源至表面距离全身辐射技术的调试及其长期稳定性
Tharmarnadar Ganesh1, Biplab Sarkar1,2, Anusheel Munshi1,3
1Department of Radiation Oncology, Fortis Memorial Research Institute, Gurgaon, Haryana, India.
Journal of medical physics
|February 13, 2026
概括
这项研究详细介绍了一种新的全身辐射 (TBI) 技术,使用延长源至表面距离 (SSD) 进行精确的患者治疗. 委托的技术证明了精确的剂量输送和放射治疗的长期稳定性.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 放射治疗技术 放射治疗技术
背景情况:
- 全身辐射 (TBI) 是一个关键的放射治疗技术.
- 在延长源至表面距离 (SSD) 时优化TBI传递对于患者的安全和治疗疗效至关重要.
研究的目的:
- 描述使用双边平行对立场在扩展源至表面距离 (SSD) 的全身辐射 (TBI) 技术的调试.
- 为了评估这种扩展SSD TBI技术的长期稳定性和准确性.
主要方法:
- 测量是在完全分散条件下的Perspex盒内使用实际患者治疗几何进行的.
- 用水等效幻影中的Farmer腔进行了深度剂量和配置测量.
- 对于扩展的SSD (333.5厘米) 来说,对于6MV和15MV的能量,量到水的校准系数得到了推导.
- 通过在不同距离 (42厘米,52厘米,62厘米) 测量双边对立场来评估侧面组织影响.
主要成果:
- 中线与表面的剂量比因光束能量和分离而有所不同,在42厘米的距离下为6 MV和15 MV光束提供了特定的值.
- 在端到端质量保证测试 (监控单元到剂量验证) 中观察到的偏差处于可接受的范围内 (-6 MV - - 2.16%,15 MV - - 1.27%).
结论:
- 已经成功证明了扩展SSD TBI技术的调试和长期稳定性.
- 这种技术提供了一种可靠的方法,以提高精度提供全身辐射.
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