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Independently on the approach used for VMAT plan optimization, the
common principle is that:
→
because rotational therapy is not sensitive to small angular
deviations, in field intensity modulation can be traded with the use of
more beam angles as long as adjacent aperture could be geometrically
connected
→
if dose rate variation is allowed, it has been shown that the same
plan quality of fixed IMRT techniques can be reached
Static and Rotational IMRT - Principle
Tang G et al 2007
IJROBP (
69)