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Heterogeneity Correction
All dose fractions of a point
kernel are scaled by the mean
electron density between the
point s of energy release and the
point r of energy deposition
Approximation for exact kernel
for every situation
Convolution/superposition : 100
7
calculations for 30cm x 30cm x
30cm, 3mm grid size …,
need
approximations !
Range scaling
Exact