Physics Bucharest 2017
6/3/2017
Varian leakage: comparison between 120- and 80-leaf MLCs
Relative scale (%)
Blue: 80-leaf MLC RED: 120-leaf MLC
2.5%
100
2.0%
50
Varian’s new “Halcyon” calims leakage of <0.4%
optical density calibration scans
Distances from central axis (cm)
0
-20.0
0.0
+20.0
Elekta leakage: comparison between MLCi, Beam Modulator and Agility
4,0
MLCi
MLC Transmission
Beam Modulator Agility
3,5
3,0
2,5
2,0
1,5
Transmission (%)
1,0
0,5
0,0
-75
-50
-25
0
25
50
75
Displacement (mm)
78
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