Technical note: GAMMORA, a free, open-source, and validated GATE-based model for Monte-Carlo simulations of the Varian TrueBeam

Leste, J.; Younes, T.; Chauvin, M.; Franceries, X.; Delbaere, A.; Vieillevigne, L.; Ferrand, R.; Bardiès, Manuel; Simon, L.

doi:10.1016/j.ejmp.2021.07.037

Cited by 8 publications

(4 citation statements)

References 25 publications

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“…The phase-space files (PSF) pertaining to all energy beams of the TrueBeam STx provided by Varian Medical Systems were used as the radiation source. The GATE/Geant4 modelling of the Truebeam STx, including the MLC HD120 and jaws, and PSF were previously validated with measurements (Younes et al 2017, Leste et al 2021). All silicon diodes (table 1) were modelled according to the confidential blueprints provided by the manufacturer.…”

Section: Methodsmentioning

confidence: 99%

Field output correction factors and electron fluence perturbation of the microSilicon and microSilicon X detectors

et al. 2022

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Objective. The aim of this study was to determine field output correction factors kfclin, fref Qclin,Qref and electron fluence perturbation for new PTW unshielded microSilicon and shielded microSilicon X silicon diode detectors. Approach. kfclin, fref Qclin,Qref factors were calculated for 6 and 10 MV with and without flattening filter beams delivered by a TrueBeam STx. Correction factors were determined for field sizes ranging from 0.5 × 0.5 cm2 to 3 × 3 cm2 using both experimental and numerical methods. To better understand the underlying physics of their response, total electron (+positron) fluence spectra were scored in the sensitive volume considering the various component-dependent perturbations. Main results. The microSilicon and microSilicon X detectors can be used down to the smallest studied field size by applying corrections factors fulfilling the tolerance of 5% recommended by the IAEA TRS483. Electron fluence perturbation in both microSilicon detectors was greater than that in water but to a lesser extent than their predecessors. The main contribution of the overall perturbation of the detectors comes from the materials surrounding their sensitive volume, especially the epoxy in the case of unshielded diodes and the shielding for shielded diodes. This work demonstrated that the decrease in the density of the epoxy for the microSilicon led to a decrease in the electron fluence perturbation. Significance. A real improvement was observed regarding the design of the microSilicon and microSilicon X detectors compared to their predecessors.

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Section: Methodsmentioning

confidence: 99%

Field output correction factors and electron fluence perturbation of the microSilicon and microSilicon X detectors

et al. 2022

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“…External beam radiation therapy GATE has been used to provide answers to complex issues that cannot be resolved with clinical software available for photon radiotherapy. These are, for example, dose calculations with large heterogeneities (Beilla et al 2017), skin dose for breast cancer treatments (Arbor et al 2019), or double calculation of radiotherapy treatment plans (Leste et al 2021). However, GATE is less used for external photon beam therapy than, for example, EGSnrc (Kawrakow 2001).…”

Section: Ion Imagingmentioning

confidence: 99%

The OpenGATE ecosystem for Monte Carlo simulation in medical physics

et al. 2022

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This paper reviews the technical ecosystem of Gate, an open-source Monte Carlo simulator for medical physics. Based on the shoulders of Geant4, the principal modules (geometry, physics, scorers) are described together with brief descriptions of some key concepts (Volume, Actors, Digitizer). The main source code repositories are described together with the automated compilation and tests processes (Continuous Integration). We then described how the OpenGATE collaboration managed the collaborative development of about one hundred developers during almost 20 years. The impact of Gate on medical physics and cancer research is then summarized. Finally, future development perspectives are indicated.

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“…Therefore, calculation-based dose veri cation was suggested to be a part of PSQA [1,[10][11]. Monte Carlo (MC) method is known as the most accurate computational tool to perform such validations and considered as a gold standard for radiation transport calculations [12], especially in case of small radiation beams, irregular surfaces, and heterogenous media [13][14][15][16][17][18][19][20][21][22]. Recently, some commercial MC-based IMRT QA tools have been provided and are currently available for using in clinical applications [1,[23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo modeling of the 160 MLC on the Siemens Artiste linac and IMRT dose calculations with MCNPX

Rafat-Motavalli,

Khodabandeh-Baygi,

Hoseinian-Azghadi

et al. 2023

Preprint

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Monte Carlo (MC) methods are considered as the most accurate dose calculation method and has become more common as a complementary method for dose verification in radiation therapy routines. The purpose of this study is to fully simulate a benchmarked Artiste head and the Siemens 160 multileaf collimator (MLC) by MCNPX 2.6 Monte Carlo code. The MC-based calculations were benchmarked against the commissioning measured data and an MLC test field. A comparison between MC-based and TPS-based dose maps was made for beams of a typical complicated IMRT plan and it was shown that the 3D gamma passing rate with criteria 3%/2mm and a dose threshold of 10% is acceptable (i.e., GPR of 97.7%). Therefore, the provided model has sufficient accuracy and feasible computation time to be used for verification of complicated IMRT plans.

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Technical note: GAMMORA, a free, open-source, and validated GATE-based model for Monte-Carlo simulations of the Varian TrueBeam

Cited by 8 publications

References 25 publications

Field output correction factors and electron fluence perturbation of the microSilicon and microSilicon X detectors

Field output correction factors and electron fluence perturbation of the microSilicon and microSilicon X detectors

The OpenGATE ecosystem for Monte Carlo simulation in medical physics

Monte Carlo modeling of the 160 MLC on the Siemens Artiste linac and IMRT dose calculations with MCNPX

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