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