2290-2291 / 3107
Basic Dose Calculation Principles
Simplified depth dose formalism, beyond d
m
PDD(d)
%
=D
max •
(f+d
m
/f+d)
2 •
e
-(
µ
•
d) •
K
s
f
distance from source to surface
d
m
or depth to
D
max
d
is depth in tissue
K
s
is the scatter
attenuation scatter
distance