Monte-Carlo dose computation in radiotherapy for lung at very low density

Beilla, S.; Younes, T.; Vieillevigne, L.; Bardiès, Manuel; Franceries, X.; Simon, L.

doi:10.1016/j.ejmp.2016.07.519

Cited by 2 publications

(2 citation statements)

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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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Section: Ion Imagingmentioning

confidence: 99%

The OpenGATE ecosystem for Monte Carlo simulation in medical physics

et al. 2022

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“…Detailed geometries of the jaws and HD 120 MLC were modeled following the manufacturer's specifications. The modeling of the geometries and the TrueBeam STx 6 MV photon beam phase-space files were validated through measurements in a water phantom (Beilla et al 2017. The phase-spaces files were then used as input data to generate a set of secondary phase-space files for an MLC-specific field size.…”

Section: Monte Carlo Simulationsmentioning

confidence: 99%

On the conversion from dose-to-medium to dose-to-water in heterogeneous phantoms with Acuros XB and Monte Carlo calculations

2019

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The method implemented in Monte Carlo (MC) algorithm to convert dose-to-medium (Dm) to dose-to-water (Dw) is usually based on the Bragg-Gray cavity theory. Acuros XB (AXB) reports also Dm and Dw but the method to calculate Dw is based on the energy deposition cross sections for water in place of those for the local media. For both algorithms, the calculation of Dw in non-water media is similar to the dose received in a small volume of water, small enough not to disturb the fluence of charged particles. Recently, two new methods revised the Bragg-Gray cavity theory, one proposed by Andreo and the other by Reynaert et al. In this context, comparisons between AXB and MC were carried out in terms of dose-to-medium () and dose-to-water (), respectively. Multilayer slab heterogeneous phantoms made of lung, bone and polytetrafluoroethylene (PTFE) were investigated and measurements were carried out using radiochromic films. These latter were then compared to and to Dw which would be obtained according to the conversion methods proposed by Andreo and Reynaert et al agreed with for all cases (±1%). In lung, all Dw calculations and film measurements were in agreement. By contrast, and differed notably in bone (4.5%) and PTFE (3.5%), and both algorithms overestimated film measurements. These findings demonstrate that the conversion method is different between AXB and MC. Furthermore, films were not able to give dose in a small volume of water according to the definition of and . Applying either the fluence correction factor suggested by Andreo or the mass energy absorption ratios proposed by Reynaert et al, resulted in a good agreement (<1%) with film measurements. According to the method used for the conversion, different Dw could be obtained which might lead to several issues in clinical context.

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Monte-Carlo dose computation in radiotherapy for lung at very low density

Cited by 2 publications

References 0 publications

The OpenGATE ecosystem for Monte Carlo simulation in medical physics

The OpenGATE ecosystem for Monte Carlo simulation in medical physics

On the conversion from dose-to-medium to dose-to-water in heterogeneous phantoms with Acuros XB and Monte Carlo calculations

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