Intensity-modulated radiotherapy, coplanar volumetric-modulated arc, therapy, and noncoplanar volumetric-modulated arc therapy in, glioblastoma: A dosimetric comparison.

•VMAT plans significantly reduces the mean doses to the optic chiasm than IMRT plans.•Small but insignificant differences were observed in GI,CI,and HI in these plans(IMRT,coVMAT,ncVMAT).•Compared with IMRT,VMAT significantly reduced MUs and beam-on time but extended calculation times.