Table 3.

Quantitative comparison between planned and measured dose distributions of non‐coplanar arcs delivered to the block phantom. Nine 160° arcs at six different couch angles were planned to deliver 8 Gy at isocenter using 10 MV flattening filter free beams. Data are averages of 10 measurements, defined as in the caption of Table 2

Field size (mm2)	MU	Average dose error (%)	Max dose error (%)	Average error Δx (mm)	Average error Δy (mm)	Average vector error v (mm)	Maximum vector error v (mm)	γ>1 3%/1 mm (%)
2.4 × 5, 9 arcs	2477	0.3 ± 2.0	3.1	0.05 ± 0.13	0.13 ± 0.10	0.20 ± 0.08	0.43	0.14