ESTRO course Dose Modelling and Verification 2017
Collimator leakage
MLC intraleaf and interleaf
1. Two effects: • Diffused dose from spiky interleaf fluence leakage • Intraleaf attenuation
Intraleaf leakage very small:
m
t
0.0408 18.0 8.0
e
e
0.28%
8 cm tungsten at 3 MeV
Measuements from Arnfield et al , 2000 Med. Phys. 27 p 2231-2241
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