Dose Course 2018_Flipping book

Large system of linear equations

• For each voxel and particle type, there is one transport equation for each direction and energy interval, in Acuros • NxNxN voxels (3.6E4 – 1E6 for a one litre volume) • D discrete angles (32 – 512 ) • E energy intervals (25 for photons, 49 for electrons)

Iterative solution • Yields at each point , , , ⇒ 2 ∙ 3 ∙ ∙ no. of equations:

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