534 / 1161
▪
3.4 x more # segments
▪
4 x more # MU
▪
in this example the MLC limitations resulted in large differences.
Step&Shoot IMRT segmentation might not be the best approach
on an Elekta linac equiped with MLCi in
this specific
case
Example multiple PTV IMRT plan: Elekta versus Varian
in ‘normal’ cases not much difference between Varian and Elekta MLCi
MLCi2: improved segmentation, similar to Varian MLC