The plans were prepared for BM with SmartArc module of Pinnacle treatment planning system. Statistical significance P .05 among collimator angles for planning target volume dose volume indices was calculated with Student's t test. ...RESULTS: The dual arc and combined two independent single arcs achieved planning objectives for C15 , C30 , and C45 . Single arc for all collimator angles and C90 for all VMAT schemes failed to achieve planning objectives. ...