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使用内部幻影和RPLGDs的妇科HDR支臂治疗的剂量评估
Itsaraporn Konlak1, Taweap Sanghangthum1, Chulee Vannavijit2
1Division of Radiation Oncology, Department of Radiology, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand.
Physical and engineering sciences in medicine
|January 28, 2026
概括
这项研究开发了一种3D打印的幻影,用于验证妇科手腕治疗中的辐射剂量. 放射光发光玻璃剂量计 (RPLGD) 证实了准确的剂量输送,确保了治疗计划系统的质量保证.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 生物医学工程 生物医学工程
背景情况:
- 治疗规划系统 (TPS) 计算支臂疗法的辐射剂量.
- 验证TPS的准确性至关重要,特别是在具有复杂剂量梯度的腔内支臂疗法中.
- 3D打印的幻影提供了一种用于验证TPS剂量计算的方法.
研究的目的:
- 为了创建一个内部的3D打印的幻影,用于妇科手腕治疗验证.
- 使用放射光发光玻璃剂量计 (RPLGD) 评估TPS的剂量计准确性.
- 量化TPS计算和临床条件下的测量之间的剂量差异.
主要方法:
- 设计和制造了一种内部幻影持有器,可容纳用于腔内支臂治疗的各种应用器.
- 利用RPLGD在临界点 (A点,B点,膀,直肠) 在幻体内精确测量剂量.
- 在六个临床治疗计划中计算和测量剂量之间的量化变化.
主要成果:
- RPLGD显示线性剂量反应高达10 Gy,不确定性最小 (3.3%).
- 测量和计算值之间的剂量差异处于可接受的临床范围内:A点 (+1.99 ± 1.11%),B点 (1.01 ± 0.02 Gy),膀 (+4.42 ± 2.56%),直肠 (+3.53 ± 1.44%).
结论:
- 一个内部3D打印的幻影与RPLGD相结合,为内腔内治疗提供了准确的剂量测量.
- 这种方法是有效的质量保证,验证在临床实践中输送的辐射剂量.
- 该研究验证了使用3D打印的幻影来确保TPS在妇科手腕治疗中的准确性.
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