The M₂ Model for Dose Simulation in Radiation Therapy

ABSTRACT

The transport of photons and electrons is studied in the field of radiotherapy to compute the dose, that is, the quantity of energy transferred to the medium by a beam of particles at each position. A kinetic model is proposed, and to decrease the computation times, it is reduced through a moment extraction. Entropy-based angular moment models of order up to two (M₁ and M₂ models) are shown to provide accurate results compared to a reference code with much lower computational costs.

Keywords:

• Photons and electrons transport
• moment models
• entropy-based closure