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Monte Carlo Simulation of Electron Beam in 3-D Water Phantom T

Recently, Monte Carlo (MC) calculation method has reported as the most accurate method of predicting dose distributions in radiotherapy. In this present work investigation on the accuracy of MC (EGSnrc) in calculating electron beam central axis dose was conducted. Calculation of central axis depth dose distributions for 9 MeV electron beams from medical linear accelerator (Siemens Primus) was performed with BEAMnrc and DOSXYZnrc source code on personal desktop. Both source codes were included in EGSnrc package. Results were compared with an ion chamber measurement. On central axis dose MC data shows a good agreement with ion chamber measurement which is less than 2% percentage different. In this context the model is accurate and potentially to achieve the dose delivery as recommended by ICRU report. Keywords—Monte Carlo, Simulation, Electron Beam Therapy, Linear accelerator, Depth Dose