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Dose Deposition Kernel High Energy
High energy
: electron track lengths are of the same order as the photon
mean free paths
Large primary dose region (long BU distance & broad penumbra)
Narrow scatter dose region (low dose outside field)
Forward directed isolevels (small amount of backscatter)
From: A. Ahnesjö and M.M. Aspradakis, Dose calculations for external photon beams in radiotherapy. Phys
Med Biol 44 (1999), pp. R99–R155.