Korean J Med Phys.
2011 Jun;22(2):85-91.
Calculation of Energy Spectra for Electron Beam of Medical Linear Accelerator Using GEANT4
- Affiliations
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- 1Department of Physics, College of Science, Yeungnam University, Gyongsan, Korea.
- 2Department of Radiation Oncology, Prebysterian Medical Center, Jeonju, Korea.
- 3Department of Therapeutic Radiology & Oncology, College of Medicine, Yeungnam University, Daegu, Korea. skkim3@ynu.ac.kr
Abstract
- The energy spectra for electron beam of medical linear accelerator were calculated using a GEANT4 Medical Linac 2 example code. The incident electron mean energy were 6, 9, 12, 16, 20 MeV. This code was designed to calculate electron beam energy spectra according to material, thickness and location of electron scattering foil affecting electron beam characteristic. Lead, Copper, Aluminum and Gold were used for scattering foil. The energy distribution for electron and photon were analyzed by changing position of scattering foil in the head of linear accelerator. The effect of electron scattering foil on energy spectra which is basic data of simulation for medical linear accelerator were presented. The calculated results would be used in design of medical accelerator head.
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