Dose Course Book

908-909 / 2239

Source size effects, focused leafs
Fieldsize 5x5cm2
Fieldsize 1x1cm2
2
10 10 cmx
Ψ
Ψ
Focused leafs (Siemens MLC geometry)
0.6
0.7
0.8
0.9
1
1.1
1.2
0.6
0.8
1.0
1.2
.
.
.
.
1.1
.
Source sizes
Point
0.35 cm
0.70 cm
16
cm
-5 -4 -3 -2 -1 0 1 2 3 4 5
0
0.1
0.2
0.3
0.4
0.5
-5 -4 -3 -2 -1 0 1 2 3 4 5
0.0
0.2
0.4
.
.
.
When the source “fills” the “inverse” view we get dramatic
decrease in fluence output with increasing source size!