Korean J Med Phys.  2011 Jun;22(2):79-84.

Study on the 6 MV Photon Beam Characteristics and Analysis Method from Medical Linear Accelerators Using Geant4 Medical Linac2 Example

Affiliations
  • 1Department of Physics, College of Science, Yeungnam University, Gyongsan, Korea.
  • 2Department of Radiation Oncology, Presbyterian Medical Center, Jeonju, Korea.
  • 3Department of Therapeutic Radiology & Oncology, College of Medicine, Yeungnam University, Daegu, Korea. skkim3@ynu.ac.kr

Abstract

In this study, Geant4 based Monte Carlo simulations were carried out for medical linear accelerator. Modified Medical Linac2 toolkit was used for calculation. The energy spectrum, most probable energy and the photon mean energy compared with the published results using the EGS4 code. The results well agreed with published results. The calculated results of photon fluence, energy fluence and mean energy according to the radius from the centre of the beam were analyzed. Monte Carlo simulation using Medical Linac2 code is considered to be useful for analysis of medical linear accelerator. Because the calculated results varies depending on Physics List model for same head structure. It it important to choose the right model for research purpose. Monte Carlo simulation using GEANT4 Medical Linac2 is a valuable for any novice to adopt this code to the study related to 6 MV photon fluence from medical linear accelerator.

Keyword

Geant4; Monte Carlo; Photon; Spectrum

MeSH Terms

Head
Particle Accelerators
Radius
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