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Kernel-Based Methods
Combine an
analytical
calculation of the primary photon
interactions with the subsequent transport and
energy
deposition
by secondary particles described by
pre-
calculated kernels
Point-spread
kernel
: Absorbed dose from
both
secondary
electrons
and
photons
around the interaction point
Calculated by
Monte Carlo
in infinite medium of water since
too chaotic
(sometimes photoelectric, Compton, …)
Energy spectrum derived from measurements (pdd)