On the transverse diffusion of beams of photons in radiation therapy
FRANK, M.
RWTH Aachen University = Rheinisch-Westfälische Technische Hochschule Aachen [RWTH Aachen]
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RWTH Aachen University = Rheinisch-Westfälische Technische Hochschule Aachen [RWTH Aachen]
Language
en
Actes de congrès/Proceedings
This item was published in
2018-06-27, vol. 237, p. 465-477
Springer International Publishing
English Abstract
Typical external radiotherapy treatments consist in emitting beams of energetic photons targeting the tumor cells. Those photons are transported through the medium and interact with it. Such interactions affect the motion ...Read more >
Typical external radiotherapy treatments consist in emitting beams of energetic photons targeting the tumor cells. Those photons are transported through the medium and interact with it. Such interactions affect the motion of the photons but they are typically weakly deflected which is not well modeled by standard numerical methods. The present work deals with the transport of photons in water. The motion of those particles is modeled by an entropy-based moment model, i.e. the M 1 model. The main difficulty when constructing numerical approaches for photon beam modelling emerges from the significant difference of magnitude between the diffusion effects in the forward and transverse directions. A numerical method for the M 1 equations is proposed with a special focus on the numerical diffusion effects.Read less <
English Keywords
implicit scheme
M1 model
relaxation scheme
Origin
Hal imported