Table 8 Penumbra variations for flattened and unflattened beams between our study and the scientific literature
Study (ref) | Beam type | Field size (cm2) | Depth (mm) | Reported value (mm) | Differences from our measurements (mm) | ||
|---|---|---|---|---|---|---|---|
Linac 1 | Linac 2 | Linac 3 | |||||
Elekta Versa HD (Narayanasamy et al. 2016) | 6MV FFF cross-plane | 10 × 10 | 100 | 7.2 | + 0.37 | + 0.39 | + 0.44 |
6MV FFF in-plane | 5.1 | + 1.23 | + 1.24 | + 1.25 | |||
6MV FF cross-plane | 7.6 | + 0.30 | + 0.28 | + 0.17 | |||
6MV FF in-plane | 5.5 | + 0.93 | + 0.94 | 0.95 | |||
Elekta Versa HD (Meshram et al., 2016) | 6MV FFF | 10 × 10 | 100 | 7.9 | -0.95 | -0.94 | -0.91 |
6MV FF | 8.4 | -1.24 | -1.25 | -1.29 | |||
Varian Clinac 21EX and MCNPX Monte Carlo Simulations (Ponisch et al., 2006) | 6MV FFF measured cross-plane | 10 × 10 | 100 | 6.4 | + 1.17 | + 1.19 | + 1.24 |
6MV FFF measured in-plane | 5.2 | + 1.13 | + 1.14 | + 1.15 | |||
6MV FFF simulations cross-plane | 5.9 | + 1.67 | + 1.69 | ++1.74 | |||
6MV FFF simulations in-plane | 5 | + 1.33 | + 1.34 | + 1.35 | |||
6MV FF measured cross-plane | 7.2 | + 0.70 | + 0.68 | + 0.57 | |||
6MV FF measured in-plane | 6 | + 0.43 | + 0.44 | + 0.45 | |||
6MV FF simulation cross-plane | 6.4 | + 1.50 | + 1.48 | + 1.37 | |||
6MV FF simulation in-plane | 5.9 | + 0.53 | + 0.54 | + 0.55 | |||
Varian TrueBeam (Beyer, 2013) | 6MV FF | 10 × 10 | 100 | 5.7 | + 1.46 | + 1.46 | + 1.41 |
5.6 | + 1.56 | + 1.56 | + 1.51 | ||||
5.5 | + 1.66 | + 1.66 | + 1.61 | ||||
Varian TrueBeam (Tanaka et al., 2020) | 6MV FFF | 3 × 3 | 100 | 5.76 | -1.13 | -1.41 | -1.48 |
10 × 10 | 6.87 | + 0.08 | + 0.09 | + 0.12 | |||