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Table 3 Summary of DVH analysis for PTV, Bladder, Femurs, Bowels and healhty tissue.

From: Neo-adjuvant chemo-radiation of rectal cancer with Volumetric Modulated Arc Therapy: summary of technical and dosimetric features and early clinical experience

  RA 3DC P
  PTV
Volume [cm 3 ] 1360 ± 250 1358 ± 218 0.98
Mean [Gy] 43.9 ± 1.3 44.0 ± 1.0 0.87
D 1% [Gy] 46.1 ± 1.5 46.3 ± 1.4 0.65
D 5-95% [Gy] 3.5 ± 0.8 4.0 ± 0.9 0.10
D 99% [Gy] 41.0 ± 1.3 40.9 ± 0.9 0.75
V 95% [%] 96.5 ± 2.7 95.3 ± 2.5 0.14
V 107% [%] 0.2 ± 0.4 1.0 ± 2.1 0.07
CI 90% 1.2 ± 0.1 1.6 ± 0.1 <0.01
CI 95% 1.1 ± 0.1 1.4 ± 0.1 <0.01
  Bladder
Volume [cm 3 ] 190 ± 166 98.0 ± 36 0.02
Mean [Gy] 34.0 ± 4.2 32.7 ± 7.1 0.45
V 40 Gy [cm 3 ] 68.2 ± 38.4 46.5 ± 26.4 0.11
  Bowels
Volume [cm 3 ] 3417.7 ± 816.5 2609.0 ± 718.1 0.13
Mean [Gy] 5.9 ± 1.0 8.7 ± 5.2 0.27
D 1% [Gy] 31.4 ± 4.0 37.8 ± 3.8 0.03
V 30 Gy [%] 2.1 ± 2.6 8.7 ± 10.8 0.22
V 36 Gy [%] 0.4 ± 0.8 4.8 ± 8.3 0.27
  Femurs
Volume [cm 3 ] 322.1 ± 101.2 315.4 ± 74.3 0.81
Mean [Gy] 8.7 ± 1.5 10.8 ± 1.7 <0.01
D 1% [Gy] 39.8 ± 1.9 43.9 ± 1.3 <0.01
  Healthy tissue
Volume [cm 3 ] 24903 ± 6518 21629 ± 3838 0.05
Mean [Gy] 8.7 ± 1.5 10.8 ± 1.7 <0.01
V 10 Gy [%] 35.5 ± 6.6 35.8 ± 6.0 0.89
DoseInt 2.1 ± 0.5 2.3 ± 0.3 <0.01
  1. Dx% = dose received by the x% of the volume; Vx% = volume receiving at least x% of the prescribed dose; CI = ratio between the patient volume receiving at least 95% of the prescribed dose and the volume of the total PTV. DoseInt = Integral dose, [Gy cm3 105]
  2. Data are relative to the primary course of 44/45 Gy only.