Cassette P, Bé M M, Jaubert F, Lépy M C
CEA/BNM-Laboratoire National Henri Becquerel, CE-Saclay, Gif-sur-Yvette Cedex, F91191, France.
Appl Radiat Isot. 2004 Feb-Apr;60(2-4):439-45. doi: 10.1016/j.apradiso.2003.11.056.
Palladium 103 is a radionuclide used in brachytherapy sources for the treatment of prostate cancers and also for other medical applications. It decays through electron capture to excited levels of 103Rh. This paper describes the calculation method used to compute the detection efficiency in the framework of the triple to double coincidence ratio model. The calculation of the energy transferred to the scintillator is made by considering the various atomic events following the electron capture and the electron conversion. The energy deposited in the scintillator after the absorption of X-rays is calculated using the PENELOPE stochastic calculation code. The main contributors to the final uncertainty and their covariance matrix are discussed. As the calculation method cannot be reduced to an explicit function, this paper describes the Monte Carlo method used for the evaluation of uncertainties.
钯103是一种放射性核素，用于近距离放射治疗源，治疗前列腺癌以及其他医学应用。它通过电子俘获衰变为103Rh的激发态。本文描述了在三重与双重符合比模型框架下用于计算探测效率的计算方法。通过考虑电子俘获和电子转换后的各种原子事件来计算转移到闪烁体的能量。使用PENELOPE随机计算代码计算X射线吸收后沉积在闪烁体中的能量。讨论了最终不确定度的主要贡献因素及其协方差矩阵。由于计算方法不能简化为显式函数，本文描述了用于评估不确定度的蒙特卡罗方法。
