Dose Course 2018_Flipping book

Example 3: Source modelling in RaySearch Raystation Manual: RayPhysics Manual v4.7

Beam source: finite size

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• Source intensity distribution model: 2D Gaussian • Source intensity distribution parameters: values obtained through automated beam model optimisation procedures • The influence of variations of the primary source as projected over the pixels of the energy fluence matrix is modelled • Geometric penumbra is modelled accounting for collimator/MLC position with respect to the finite source size (but not shape of the collimator jaw end?)

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