Department of Nuclear Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
J Appl Clin Med Phys. 2011 Nov 15;12(4):3581. doi: 10.1120/jacmp.v12i4.3581.
This work presents experimental dosimetry results for a new 103Pd brachytherapy seed, in accordance with the AAPM TG-43U1 recommendation that all new low-energy interstitial brachytherapy seeds should undergo one Monte Carlo (MC) and at least one experimental dosimetry characterization. Measurements were performed using TLD-GR200A circular chip dosimeters using standard methods employing thermoluminescent dosimeters in a Perspex phantom. The Monte Carlo N-particle (MCNP) code, version 5 was used to evaluate the dose-rate distributions around this model 103Pd source in water and Perspex phantoms. The consensus value for dose-rate constant of the IR06-103Pd source was found equal to 0.690 cGy·h(-1)·U(-1). The anisotropy function, F(r, θ), and the radial dose function, g(L)(r), of the seed were measured in Perspex phantom and calculated in both Perspex and liquid water phantom. The measured values were also found in good agreement with corresponding MC calculations.
这项工作根据 AAPM TG-43U1 建议，展示了一种新型 103Pd 近距离放射治疗种子的实验剂量学结果，即所有新的低能量间质近距离放射治疗种子都应进行一次蒙特卡罗（MC）模拟和至少一次实验剂量学特征描述。使用 TLD-GR200A 圆形芯片剂量计，采用在 Perspex 模型中的热释光剂量计的标准方法进行测量。蒙特卡罗 N 粒子（MCNP）代码，版本 5 用于评估该模型 103Pd 源在水中和 Perspex 模型中的剂量率分布。IR06-103Pd 源的剂量率常数的共识值被发现等于 0.690 cGy·h(-1)·U(-1)。种子的各向异性函数 F(r,θ)和径向剂量函数 g(L)(r)在 Perspex 模型中进行测量，并在 Perspex 和液体水模型中进行计算。测量值也与相应的 MC 计算结果吻合良好。
