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Table 6 Summary of the technical parameters for treatment plans created with FF and FFF beams

From: The impact of flattening-filter-free beam technology on 3D conformal RT

Parameter Breast Neurocranium Lung Spine metastasis Prostate
Gantry positions 2 2 3 4 5
Fields 5.2 ± 0.7 3.0 ± 0.0 6.9 ± 2.1 4.1 ± 0.6 5.9 ± 0.9
14.8 ± 2.0 13.4 ± 1.2 14.9 ± 5.1 10.6 ± 2.5 11.4 ± 1.7
Range Fields 4 - 6 3 - 3 5 - 10 3 – 5 5 - 7
12 - 18 11 - 15 10 - 25 5 – 14 9 - 15
MU 244.3 ± 9.0 318.0 ± 2.3 257.4 ± 13.6 317.8 ± 11.8 305.7 ± 17.8
451.8 ± 27.8 686.1 ± 39.3 427.0 ± 76.5 411.5 ± 49.1 416.7 ± 33.6
Range MU 227 - 259 314 - 322 245 - 282 301 – 340 280 - 350
393 - 494 623 - 738 351 - 564 346 – 505 351 - 485
tx time [s] 146 ± 5 112 ± 1 128 ± 26 - 165 ± 11
213 ± 21 199 ± 14 188 ± 34 - 193 ± 21
Δ FFF – FF [s] 68 87 60 - 28
  1. FFF results are in bold. Statistical significance is defined for p < 0.01. Tx-times for spine metastasis plans are excluded due to inconsistent FF planning with virtual wedge fields.