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Développement et validation de l'application de la force de Lorentz dans le modèle aux moments entropiques M1. Étude de l'effet du champ magnétique sur le dépôt de dose en radiothérapie externe

Abstract : The majority of patients diagnosed with cancer are treated by radiotherapy, one of the principal treatment modality with surgery and chemotherapy. It consists in the delivery of high energy radiation on a target volume. It aims to destroy the cancerous cells without damaging sane tissues. In clinical practice, numerical tools are used in order to predict how the energy will be deposited in the patient's body. However, these methods can lack of accuracy or cost too much in terms of calculation time to be suitable for clinical use. As a consequence, we developed a new model able to calculate the transport and energy deposition of ionizing particles in human tissues, efficiently and accurately. New installations allowing the treatment of patients by radiotherapy while imaging them by Magnetic Resonance Imagery are currently marketed. The magnetic fields induced by this technology have as secondary and noxious effect to deflect the charged particles injected or created in the target medium, which might modify highly the deposited energy. Despite that, there aren't yet commercially available numerical solution allowing to reproduce these effects accurately and quickly. We implemented the magnetic effects in our model to. We validate our model by numerical comparisons with a reference Monte-Carlo code, FLUKA, and with experimental comparisons led in the Bergonié Institute (Bordeaux).
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https://tel.archives-ouvertes.fr/tel-02070716
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Submitted on : Monday, March 18, 2019 - 11:15:11 AM
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Jonathan Page. Développement et validation de l'application de la force de Lorentz dans le modèle aux moments entropiques M1. Étude de l'effet du champ magnétique sur le dépôt de dose en radiothérapie externe. Astrophysique [astro-ph]. Université de Bordeaux, 2018. Français. ⟨NNT : 2018BORD0248⟩. ⟨tel-02070716⟩

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