IMRT 2018
Kernel-based methods: The TERMA concept
s
sE
), (
(
)
prim
sET =
E
E
,
(
,
)
s
primary photon source
)(
raytracing through beam modulating elements, fluence scaled by 1/s 2
mass attenuation coefficient
primary fluence
TERMA: T otal E nergy R eleased per MA ss
all energy released at s through physical interactions of the primary photon with the medium: photons, electrons, (positrons)
s
r
Neglected in most commercial dose calc. algorithms
ESTRO IMRT course 2017 Dose Calculation in Static and Rotational IMRT Madrid April 13th, 2017
-27-
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