The aim of the study was to compare the different stereotactic treatment plans and
dose calculation algorithms for small targets with film dosimetry in anthropomorphic
phantom. Treatment plans were prepared for multiple targets with single setup isocenter.
Plans for three different irradiation techniques were generated using conformal arc
with four non-coplanar arcs, RapidArc with two coplanar full arcs and RapidArc with
four non-coplanar arcs in the Varian Eclipse v13.7.16 TPS. Conformal arc and RapidArc
plans were calculated using AAA, Acuros XBDm and XBDw algorithms. Conformity index,
gradient index and dose maximum were calculated for all PTVs. All measurements were
made on the Varian TrueBeam linear accelerator. Comparison between computed and measured
dose distributions was performed with gamma evaluation criteria of 3%, 3 mm; 3%, 1
mm and 2%, 2 mm. According to our results, the Eclipse AAA and AXB algorithms provide
accurate dose distributions for homogeneous cranial irradiation.
