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The problem …
•
Let us start from the simplest case (point isotopic monoenergetic
photon source in infinite medium of given composition)
•
If I know everything there is to know about the source and the
medium, can I calculate dose at a point i …?
prR
over t,
energy
radiant
or the rate
energy
radiant
the
calculate
can
i
activity
intial
from
r
i
)ir
exp(
2
ir 4π
prR
= pr
Ψ
point,
any
at
fluence
energy
calculate
can
i R
from
−
i
i
i
i
prΤ)
μ
enμ
(
prΨ)
ρ
enμ
(= prK
point,
any
at
KERMA
particles
charged
of
energy
kinetic
to ed
transferr
is that
TERMA
of
fraction
the
calculate
also can
i
=
i
i
i
pr
Ψ)
ρ
μ
(=T
point,
any
at
TERMA
the
calculate
can
i Ψ
from