Sadeghi Mahdi, Khanmohammadi Zahra
Agricultural, Medical and Industrial Research School, Nuclear Science and Technology Research Institute, Karaj, Iran.
Radiat Prot Dosimetry. 2011 Nov;147(3):451-6. doi: 10.1093/rpd/ncq494. Epub 2011 Jan 12.
A new brachytherapy (125)I source has been investigated at Iranian Agricultural, Medical and Industrial Research School. Dosimetric characteristics [dose-rate constant Λ, radial dose function g(l)(r) and anisotropy function F(r,)] of IRA-(125)I were theoretically determined in terms of the updated AAPM task group 43 (TG-43U1) recommendations. Versions 5 and 4C of the Monte Carlo radiation transport code were used to calculate the dosimetry parameters around the source. The Monte Carlo calculated dose-rate constant of the (125)I source in water was found to be 92×10(-4) Gy h(-1) U(-1) with an approximate uncertainty of ±3 %. Brachytherapy seed model, 6711-(125)I, carrying (125)I radionuclides, was modelled and benchmarked against previously published values. Finally, the calculated results were compared with the published results of those of other source manufacturers.
伊朗农业、医学与工业研究学院对一种新型近距离放射治疗（125）I 源进行了研究。根据美国医学物理学家协会任务组 43（TG - 43U1）的最新建议，从理论上确定了 IRA -（125）I 的剂量学特征[剂量率常数 Λ、径向剂量函数 g(l)(r)和各向异性函数 F(r)]。使用蒙特卡罗辐射传输代码的第 5 版和 4C 版来计算源周围的剂量学参数。发现蒙特卡罗计算得出的（125）I 源在水中的剂量率常数为 92×10(-4) Gy h(-1) U(-1)，近似不确定度为±3%。对携带（125）I 放射性核素的近距离放射治疗籽源模型 6711 -（12�）I 进行了建模，并与先前发表的值进行了基准测试。最后，将计算结果与其他源制造商发表的结果进行了比较。
