Advanced Physics for Brachytherapy 2018
LQ Model
2 D D E + = b
a
Biological effect E of dose D:
Total dose :
D
dn =
n... Nr. of fractions, d... fraction dose
2
( nd d d nE ) b a b d
(
a
)
= + = + =
d
nd
a
1(
) + =
a
/
b
= E = a x
total dose x
relative dose effectiveness
Biologically effective dose: BED = total dose x relative dose effectiveness = E / a
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