Fig. 3From: A fast optimization approach for treatment planning of volumetric modulated arc therapyThe segments and dose distributions of VMAT plans for five beam sets with the increasing numbers of beams. a VMAT plan with 5 equal-space beams (72° spacing). b VMAT plan with 10 equal-space beams (36° spacing). c VMAT plan with 20 equal-space beams (36° spacing). d VMAT plan with 40 equal-space beams (9° spacing). e VMAT plan with 60 equal-space beams (6° spacing)Back to article page