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Journal of the Korean Physical Society

, Volume 73, Issue 12, pp 1814–1820 | Cite as

GEANT4-based Monte Carlo Simulation of Beam Quality Correction Factors for the Leksell Gamma Knife® Perfexion™

  • Thomas Schaarschmidt
  • Tae Hoon Kim
  • Yong Kyun Kim
  • Hye Jeong Yang
  • Hyun-Tai ChungEmail author
Article

Abstract

With the publication of TRS-483 in late 2017 the IAEA has established an international code of practice for reference dosimetry in small and non-standard fields based on a formalism first suggested by Alfonso et al. in 2008. However, data on beam quality correction factors (\(k_{{Q_{msr,}}{Q_0}}^{{f_{msr,}}{f_{ref}}}\)) for the Leksell Gamma Knife® Perfexion™ is scarce and what little data is available was obtained under conditions not necessarily in accordance with the IAEA’s recommendations. This study constitutes the first systematic attempt to calculate those correction factors by applying the new code of practice to Monte Carlo simulation using the GEANT4 toolkit. \(k_{{Q_{msr,}}{Q_0}}^{{f_{msr,}}{f_{ref}}}\) values were determined for three common ionization chamber detectors and five different phantom materials, with results indicating that in most phantom materials, all chambers were well suited for reference dosimetry with the Gamma Knife®. Similarities and differences between the results of this study and previous ones were also analyzed and it was found that the results obtained herein were generally in good agreement with earlier PENELOPE and EGSnrc studies.

Keywords

GEANT4 Gamma Knife Perfexion Beam quality correction factor \(k_{{Q_{msr,}}{Q_0}}^{{f_{msr,}}{f_{ref}}}\) Calibration Small field dosimetry TRS-483 

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Copyright information

© The Korean Physical Society 2018

Authors and Affiliations

  • Thomas Schaarschmidt
    • 1
  • Tae Hoon Kim
    • 1
  • Yong Kyun Kim
    • 1
  • Hye Jeong Yang
    • 2
  • Hyun-Tai Chung
    • 3
    Email author
  1. 1.Department of Nuclear EngineeringHanyang UniversitySeoulKorea
  2. 2.Department of Biomedicine & Health Sciences and Biomedical EngineeringCatholic University College of MedicineSeoulKorea
  3. 3.Department of NeurosurgerySeoul National University College of MedicineSeoulKorea

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