放射治疗中相对剂量测量的不确定度

IF 0.7 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
K. Buliński, T. Kuszewski, K. Wnuk, J. Braziewicz, K. Slosarek
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引用次数: 0

摘要

与任何其他测量一样,剂量的测量及其分布的测量都受到测量不确定性的影响。这些不确定性影响放疗治疗计划期间患者体内的所有剂量计算和剂量分布。测量不确定性不是医学物理学家的错误,而是他们工作中不可避免的因素。在规划病人体内的剂量分布时,我们经常尝试在关键器官(OaR -危险器官)的体积中减少剂量,或在PTV区域增加几个百分点的最小剂量。认为在制定治疗方案时,应考虑测量不确定度的影响。由于放射治疗中不同物理量对计算出的患者体内剂量分布有特殊的影响,本文提出了以百分比深度剂量、剖面函数和输出因子计算放射治疗中不同物理量测量不确定度的方法。在计划治疗时必须考虑到的不确定性每部分的计划剂量和PTV的实际剂量,可能相差4%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Uncertainties in the measurement of relative doses in radiotherapy
Abstract Both the measurement of the dose and the measurement of its distribution, like any other measurements, are subject to measurement uncertainties. These uncertainties affect all dose calculations and dose distributions in a patient’s body during treatment planning in radiotherapy. Measurement uncertainty is not a medical physicist’s error, but an inevitable element of their work. Planning the dose distribution in a patient’s body, we often try to reduce it in the volume of critical organs (OaR - Organ at Risk) or increase the minimum dose in the PTV region by a few percent. It is believed that the measurement uncertainty should be taken into account in these calculations at the stage of treatment planning. The paper presents the method of calculating the measurement uncertainty for different physical quantities in radiotherapy as percentage depth dose, profile function and output factor, due to the fact that these quantities have a particular impact on the calculated dose distributions in a patient’s body. The uncertainties that must be taken into account in planning treatment the planned dose per fraction and real in PTV, maybe different up to 4%.
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来源期刊
Polish Journal of Medical Physics and Engineering
Polish Journal of Medical Physics and Engineering RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-
CiteScore
1.30
自引率
0.00%
发文量
19
期刊介绍: Polish Journal of Medical Physics and Engineering (PJMPE) (Online ISSN: 1898-0309; Print ISSN: 1425-4689) is an official publication of the Polish Society of Medical Physics. It is a peer-reviewed, open access scientific journal with no publication fees. The issues are published quarterly online. The Journal publishes original contribution in medical physics and biomedical engineering.
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