2010全国生物材料大会论文集之 (696).pdf

The simulation of linear accelerator Using BEAMnrc
with DOSXYZnrc1

Ying-hua Shi,Ling-hong Zhou2,Xin Zhen,Wen-ting Lu Shu-xu Zhang
School of Biomedical Engineering, Southern Medical Radiotherapy Center, Affiliated Tumor Hospital Guangzhou
University Medical College
Guangzhou, China Guangzhou, China
Email: shiyh1029@


Abstract—Linear accelerator accurate simulation is the pleted. One doesn’t know the characteristics of the
prerequisite of Monte Carlo dose calculation algorithm. The incident electron beams due to proprietary. And even the
study simulated 6MV photon beam produced by Varian 600C details of same type of machines with specified photon energy
medical linear accelerator to derive the mean energy and the full- are not the same due to positioning, machining and urate
width half-maximum(FWHM) of incident electron beam intensity measuring of a linear accelerator. The FWHM of the electron
distribution (assumed Gaussian distribution) with BEAMnrc and beam energy distribution even up to 20%, there is no
DOSXYZnrc by matching calculated and measured depth dose correlation observed between calculated and measured depth
curves and off-axis ratios at a depth of in water. Depth dose curves and off-axis ratios [11]. The influence of these
dose curve is sensitive to the mean energy, insensitive to radial factors, only incide