Now playing · 01 Therapy
Geometric penumbra
P = 6.000 mm
P
=
s
⋅
S
S
D
+
d
−
S
C
D
S
C
D
P = s\cdot\frac{\mathrm{SSD}+d-\mathrm{SCD}}{\mathrm{SCD}}
P
=
s
⋅
SCD
SSD
+
d
−
SCD
Source-size penumbra at depth from collimator distance.
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