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让d优化验证使用SOI微波测量仪
V A Pan1, L T Tran1, T Madden2
1Centre for Medical and Radiation Physics, University of Wollongong, Wollongong, NSW, Australia.
International journal of radiation oncology, biology, physics
|February 1, 2024
概括
这项研究实验验证了剂量平均线性能量转移 (LETd) 优化的质子疗法计划,显示脑干剂量减少. 这标志着对患者治疗的首次临床实施验证.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 生物物理学的生物物理.
背景情况:
- 质子疗法提供精确的剂量传递,但优化生物剂量,如剂量平均线性能量转移 (LETd),对于最小化副作用至关重要.
- 对先进的治疗规划技术的实验验证对于临床转化至关重要.
研究的目的:
- 在质子疗法中首次实验验证剂量平均线性能量转移 (LETd) 优化治疗计划.
- 评估在脑干中LETd加权剂量的减少,用于表膜瘤治疗计划.
主要方法:
- 对于一个尾瘤病例,使用了三种治疗规划方法 (临床,方案,单场).
- 计划被重新优化,以最大限度地减少大脑干中的LETd.
- 使用在绝缘体上的微剂量计进行的实验测量是在固体水幻体中进行的.
主要成果:
- LETd优化使脑干剂量减少了12% (临床),19% (协议) 和4% (单场),同时保持了瘤覆盖范围.
- 对LETd加权剂量的实验测量与治疗计划系统计算和蒙特卡洛模拟一致.
- 结果验证了LETd优化在质子疗法中的有效性.
结论:
- 这项研究为质子治疗的临床LETd优化提供了第一个实验验证.
- 这些发现支持实施LETd优化计划,以改善质子疗法患者的治疗结果.
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When one or more data points appear far from the rest of the data, there is a need to determine whether they are outliers and whether they should be eliminated from the data set to ensure an accurate representation of the measured value. In many cases, outliers arise from gross errors (or human errors) and do not accurately reflect the underlying phenomenon. In some cases, however, these apparent outliers reflect true phenomenological differences. In these cases, we can use statistical methods...
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The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
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