IMRT Course 2016

Kernel-based methods: 2D-superposition methods: Pencil Kernel algorithms

3D point kernel

pencil kernel

Integrate 3D point kernels along beam direction (‘pre-convolution’):

→ patient-specific local lateral scatter cannot be modelled well!

Dose calculation becomes a 2D-integration (superposition integral):

∫

( ) r

( ) ( ) Ψ = srps sd rD rr r ,

2

Fluence on the patient surface ( ) : s r Ψ ( ) : , srp rr Pencil Beam kernel

ESTRO IMRT course 2016 Dose Calculation in Static and Rotational IMRT London April 7th, 2016

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