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Table 5 DVH analysis for OAR of the groups lung, spine metastasis and prostate for treatment plans created with FF and FFF beams

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

Parameter Lung Spine metastasis Prostate
  OAR   
n 7 10 11
  Rectum   
Volume [cm3] - - 75.8 ± 47.2
Mean+SD [Gy] - - 48.6 ± 10.7
- - 49.8 ± 10.7
p - - 0.020
V50Gy [%] - - 52.2 ± 19.5
  - - 56.4 ± 20.8
p - - 0.024
  Bladder   
Volume [cm3] - - 227.8 ± 128.5
Mean+SD [Gy] - - 29.5 ± 13.7
- - 31.0 ± 14.2
p - - 0.019
V50Gy [%] - - 29.8 ± 20.9
  - - 31.6 ± 21.2
p - - 0.041
  Myelon   
D2% [Gy] 29.0 ± 5.9 38.4 ± 0.4 -
  29.4 ± 7.7 39.3 ± 0.5 -
p 0.697 0.001 -
  1. FFF results are in bold. VxGy: volume receiving at least x Gy. Vx: volume receiving at least x % of the prescribed dose. Dx %: dose received by at least x% of the volume. Statistical significance is defined for p < 0.01.