Monte Carlo Simulation of Dosimetric Parameters for Hybrid PdI Source in Brachytherapy

According to dose calculation formula recommended by AAPM TG-43U1,dose rate constant of Model 6711 ¹²⁵I brachytherapy source was calculated by Monte Carlo method. The calculation results were in good agreement with TG-43U1. Then, dose rate constant,radial dose function and anisotropy function of new hybrid PdI source were calculated by Monte Carlo method．Empiric equations were obtained for radial dose function．