Table 2.
Absolute %RE | ||||
---|---|---|---|---|
Energy | Input Field Size | Output field size | Mean* | Max |
6 MV WFF | 4×4 | 10×10 | 0.26 ± 0.08 | 0.46 |
10×10 | 4×4 | 0.31 ± 0.10 | 0.51 | |
4×4 | 30×30 | 0.29 ± 0.13 | 0.58 | |
30×30 | 4×4 | 0.31 ± 0.09 | 0.52 | |
10×10 | 30×30 | 0.23 ± 0.11 | 0.56 | |
30×30 | 10×10 | 0.24 ± 0.06 | 0.35 | |
10 MV WFF | 4×4 | 10×10 | 0.24 ± 0.08 | 0.41 |
10×10 | 4×4 | 0.31 ± 0.12 | 0.53 | |
4×4 | 30×30 | 0.29 ± 0.22 | 1.15 | |
30×30 | 4×4 | 0.36 ± 0.18 | 0.82 | |
10×10 | 30×30 | 0.19 ± 0.06 | 0.37 | |
30×30 | 10×10 | 0.25 ± 0.10 | 0.51 | |
15 MV WFF | 4×4 | 10×10 | 0.29 ± 0.14 | 0.70 |
10×10 | 4×4 | 0.35 ± 0.17 | 0.93 | |
4×4 | 30×30 | 0.31 ± 0.25 | 1.21 | |
30×30 | 4×4 | 0.41 ± 0.23 | 1.04 | |
10×10 | 30×30 | 0.19 ± 0.05 | 0.29 | |
30×30 | 10×10 | 0.28 ± 0.16 | 0.75 | |
6 MV FFF | 4×4 | 10×10 | 0.32 ± 0.20 | 0.96 |
10×10 | 4×4 | 0.27 ± 0.16 | 0.77 | |
4×4 | 30×30 | 0.37 ± 0.29 | 1.21 | |
30×30 | 4×4 | 0.27 ± 0.14 | 0.71 | |
10×10 | 30×30 | 0.24 ± 0.14 | 0.77 | |
30×30 | 10×10 | 0.29 ± 0.17 | 0.92 | |
10 MV FFF | 4×4 | 10×10 | 0.22 ± 0.12 | 0.56 |
10×10 | 4×4 | 0.26 ± 0.13 | 0.62 | |
4×4 | 30×30 | 0.25 ± 0.20 | 0.98 | |
30×30 | 4×4 | 0.29 ± 0.17 | 0.72 | |
10×10 | 30×30 | 0.19 ± 0.07 | 0.40 | |
30×30 | 10×10 | 0.23 ± 0.14 | 0.71 |
Note: WFF = With flattening filter, FFF = Flattening filter free.
Data are shown as means± standard deviations.