High performance modelling of the transport of energetic particles for photon radiotherapy

•We propose a new Boltzmann solver (M1) based on a specific angular momentum closure.•Different validation tests with heterogeneities are defined.•In computing the deposited dose, M1 shows an accuracy comparable to a MC simulation.•The great advantage of M1 is the reduced computational time (order o...

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Bibliographic Details
Published in:Physica medica 2017-10, Vol.42, p.305-312
Main Authors: Birindelli, Gabriele, Feugeas, Jean-Luc, Caron, Jérôme, Dubroca, Bruno, Kantor, Guy, Page, Jonathan, Pichard, Teddy, Tikhonchuk, Vladimir, Nicolaï, Philippe
Format: Article
Language:English
Subjects:
Boltzmann equation
Deterministic dose calculation
Monte-Carlo algorithm
Radiotherapy treatment planning system
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Summary:•We propose a new Boltzmann solver (M1) based on a specific angular momentum closure.•Different validation tests with heterogeneities are defined.•In computing the deposited dose, M1 shows an accuracy comparable to a MC simulation.•The great advantage of M1 is the reduced computational time (order of minutes). This work consists of the validation of a new Grid Based Boltzmann Solver (GBBS) conceived for the description of the transport and energy deposition by energetic particles for radiotherapy purposes. The entropic closure and a compact mathematical formulation allow our code (M1) to calculate the delivered dose with an accuracy comparable to the Monte-Carlo (MC) codes with a computational time that is reduced to the order of few minutes without any special processing power requirement. A validation protocol with heterogeneity inserts has been defined for different photon sources. The comparison with the MC calculated depth-dose curves and transverse profiles of the beam at different depths shows an excellent accuracy of the M1 model.
ISSN:1120-1797
1724-191X
DOI:10.1016/j.ejmp.2017.06.020