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VMAT fields: Influence of low density medium
Differences between doses computed
between two versions of same model
AAA v8.6.15
vs
AAA v10.0.25
Major difference between versions was the
resolution of the fluence matrix
2.5mm
vs
0.3125mm
Ong et al (2011) Med Phys 38(8), 4471-4479
Clinical VMAT plan
6MV
Measurement in
homogeneous
polystyrene
EBT film
Film
13% local difference for AAA8, 1mm
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