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Electron beam
Photon beam
The more ‘black’, the higher the dose deposited
in film
Determine dose D
w
(i
) in water
:
1. measure I(i) and I
0
(i) with densitometer
2. Transmission T(i)=I(i)/I
0
(i)
3. calculate OD
net
: OD(i)=
10
logT(i) – OD
fog