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GEANT4-based Monte Carlo Simulation of Beam Quality Correction Factors for the Leksell Gamma Knife (R) Perfexion

Title
GEANT4-based Monte Carlo Simulation of Beam Quality Correction Factors for the Leksell Gamma Knife (R) Perfexion
Author
김용균
Keywords
GEANT4; Gamma Knife; Perfexion; Beam quality correction factor; k(Qmsr, Q0)(fmer, fref); Calibration; Small field dosimetry; TRS-483
Issue Date
2018-12
Publisher
KOREAN PHYSICAL SOC
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v. 73, no. 12, page. 1814-1820
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(Qmsr, Q0)(fmer, fref)) for the Leksell Gamma Knife (R) Perfexion (TM) 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(Qmsr, Q0)(fmer, fref) 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 (R). 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.
URI
https://link.springer.com/article/10.3938%2Fjkps.73.1814https://repository.hanyang.ac.kr/handle/20.500.11754/120867
ISSN
0374-4884; 1976-8524
DOI
10.3938/jkps.73.1814
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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