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both
photons
and
neutrons
can induce tumors
biological effect of
neutrons
is higher than of
photons
for the same physical dose D [Gy=J/kg], more tumors with
neutrons
biologically, 1 Gy in a
photon
beam
1 Gy in a
neutron
beam
use
D
equivalent
instead of physical dose D
- unit of D
equivalent
is
Sievert
(Sv)
- 1 Sv has the same tumor induction in all types of beams
12
Equivalent dose
Concept of Equivalent Dose