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ESTRO IMRT course 2015
Dose Calculation in Static and Rotational IMRT
Brussels October 8th, 2015
-36-
Kernel-based methods:
2D-superposition methods: Pencil Kernel algorithms
Dose calculation becomes a 2D-integration (superposition integral):
( )
( ) ( )
∫
Ψ =
srps sd rD
,
2
Fluence on the patient surface
( )
:
s
Ψ
( )
: ,
srp
Pencil Beam kernel
Integrate 3D point kernels
along beam direction
(‘pre-convolution’):
3D point kernel
pencil kernel
→
patient-specific
local
lateral
scatter cannot be modelled well!