Gądek Adam, Wendykier Jacek, Grządziel Aleksandra, Bekman Barbara, Smolińska Barbara, Bekman Adam, Niewiadomska Beata, Prażmowska Joanna, Woźniak Bożena, Ślosarek Krzysztof
Radiotherapy Planning Department, Maria Sklodowska-Curie National Research Institute of Oncology Gliwice Branch, Gliwice, Poland.
Medical Physics Department, Maria Sklodowska-Curie National Research Institute of Oncology Gliwice Branch, Gliwice, Poland.
Rep Pract Oncol Radiother. 2022 May 19;27(2):241-249. doi: 10.5603/RPOR.a2022.0019. eCollection 2022.
To properly configure a treatment planning system, a measurement data set is needed, which consists of the values required for its configuration. The aim is to obtain a dosimetric model of the beam that is as compatible as possible with the measured values. The set of required data can be supplemented with optional values. The aim of the study was to assess the influence of optional measurement data on the compliance of the calculations with the measurements.
Dosimetric measurements, model configuration and dose distribution calculations were performed for the photon radiation beams generated by the VMS TrueBeam linear accelerator. Beams were configured on an Eclipse™ v. 15.6 system using the Acuros v. 15.6 algorithm. The measured and calculated data were entered into the Alfard™ software for comparison with the calculated dose distributions. In the last stage, the absolute dose values at the designated points were also compared. The obtained data were statistically analysed with Statistica™ v. 13.3.
The work showed that the differences in the shape of the beam profile, depth dose and the dose value in points were not related to the use of optional data. Differences in dose distributions are within the tolerance. It cannot be determined under which conditions the use of optional data has a more favourable effect on the reflection of the actual dose values.
The use of optional data in modelling photon radiation beams does not significantly improve the compliance of the calculated and measured dose values.
为了正确配置治疗计划系统，需要一个测量数据集，该数据集由其配置所需的值组成。目的是获得与测量值尽可能兼容的射束剂量学模型。所需数据集可以用可选值进行补充。本研究的目的是评估可选测量数据对计算结果与测量结果一致性的影响。
对VMS TrueBeam直线加速器产生的光子辐射束进行剂量学测量、模型配置和剂量分布计算。使用Acuros v. 15.6算法在Eclipse™ v. 15.6系统上配置射束。将测量和计算的数据输入Alfard™软件，以便与计算出的剂量分布进行比较。在最后阶段，还比较了指定点处的绝对剂量值。使用Statistica™ v. 13.3对获得的数据进行统计分析。
研究表明，射束轮廓形状、深度剂量和各点剂量值的差异与可选数据的使用无关。剂量分布差异在公差范围内。无法确定在哪些条件下使用可选数据对实际剂量值的反映有更有利的影响。
在光子辐射束建模中使用可选数据并不能显著提高计算剂量值与测量剂量值的一致性。
