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Determination of water equivalent ratio for some dosimetric materials in proton therapy using MNCPX simulation tool

  • Reza Bagheri
  • Alireza Khorrami MoghaddamEmail author
  • Bakhtiar Azadbakht
  • Mahmoud Reza Akbari
  • Seyed Pezhman Shirmardi
Article
  • 12 Downloads

Abstract

The water equivalent ratio (WER) was calculated for polypropylene (PP), paraffin, polyethylene (PE), polystyrene (PS), polymethyl methacrylate (PMMA), and polycarbonate materials with potential applications in dosimetry and medical physics. This was performed using the Monte Carlo simulation code, MCNPX, at different proton energies. The calculated WER values were compared with National Institute of Standards and Technology (NIST) data, available experimental and analytical results, as well as the FLUKA, SRIM, and SEICS codes. PP and PMMA were associated with the minimum and maximum WER values, respectively. Good agreement was observed between the MCNPX and NIST data. The biggest difference was 0.71% for PS at 150 MeV proton energy. In addition, a relatively large positive correlation between the WER values and the electron density of the dosimetric materials was observed. Finally, it was noted that PE presented the most analogous Depth Dose Characteristics to liquid water.

Keywords

Water equivalent ratio Proton therapy Dosimetric materials MCNPX code 

Notes

Acknowledgments

The authors thank Dr. M.A. Roshanzamir (Nuclear Science and Technology Research Institute, Iran) for modifying and editing the manuscript.

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Copyright information

© China Science Publishing & Media Ltd. (Science Press), Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Chinese Nuclear Society and Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Reza Bagheri
    • 1
  • Alireza Khorrami Moghaddam
    • 2
    Email author
  • Bakhtiar Azadbakht
    • 3
  • Mahmoud Reza Akbari
    • 4
  • Seyed Pezhman Shirmardi
    • 1
  1. 1.Radiation Application Research SchoolNuclear Science and Technology Research InstituteTehranIran
  2. 2.Radiology Department, Allied FacultyMazandaran University of Medical Sciences (MazUMS)SariIran
  3. 3.Department of Medical EngineeringBorujerd Branch, Islamic Azad UniversityBorujerdIran
  4. 4.Therapy Level LaboratorySecondary Standard Dosimetry LaboratoryKarajIran

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