Otani Yuki, Shimamoto Shigetoshi, Sumida Iori, Takahashi Yutaka, Tani Shoji, Oshima Tetsuya, Onosaka Satoshi, Isohashi Fumiaki, Tamari Keisuke, Ogawa Kazuhiko
Department of Radiology, Kaizuka City Hospital, Japan.
Department of Radiation Oncology, Osaka University Graduate School of Medicine, Japan.
Phys Imaging Radiat Oncol. 2018 Aug 31;7:23-26. doi: 10.1016/j.phro.2018.08.004. eCollection 2018 Jul.
In high-dose-rate brachytherapy, the geometry of the radioactive source is sometimes updated. Some institutions use a different source model for the dose calculation in treatment planning and treatment. The effects of this discrepancy were examined for four types of treatment plans, and ten patients were selected for each treatment plan. The impact of different source models depended on the types of treatment plan, patients, and dose index. To reduce the uncertainty and improve the reliability of the data, it would be better to use more robust metrics (D and D) for treatment planning evaluation in facilities with this problem.
在高剂量率近距离放射治疗中，放射源的几何形状有时会更新。一些机构在治疗计划和治疗的剂量计算中使用不同的源模型。针对四种治疗计划研究了这种差异的影响，每种治疗计划选取了10名患者。不同源模型的影响取决于治疗计划的类型、患者和剂量指数。为了减少不确定性并提高数据的可靠性，对于存在此问题的机构，在治疗计划评估中使用更稳健的指标（D和D）会更好。
