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Table 1 Prostate target volume

From: Intensity-modulated radiation therapy using static ports of tomotherapy (TomoDirect): comparison with the TomoHelical mode

  TomoHelical TomoDirect
    Angles A ( p-value ) Angles B ( p-value )
   (Mean ± standard deviation)
Patient number 19
PTV* (cc) 95.4 ± 22
Modulation factor 2
Pitch 0.215
Field width 2.5
Conformity index 1.95 ± 0.27 2.08 ± 0.37 (0.22) 2.01 ± 0.5 ( 0.61)
Uniformity index 1.06 ± 0.04 1.07 ± 0.05 (0.26) 1.06 ± 0.04 (0.4)
D95% (%) 96 ± 3 96 ± 3 (0.99) 96 ± 2 (0.64)
Time (sec) 202 ± 15 221 ± 19 ( 0.001 ) 215 ± 23 (0.04)
Rectum V10 Gy (%) 99 ± 2 99 ± 2 (0.51) 98 ± 3 (0.32)
  V20 Gy (%) 78 ± 15 87 ± 11 (0.035) 81 ± 12 (0.49)
  V30 Gy (%) 50 ± 4 65 ± 22 (0.005) 60 ± 19 (0.03)
  V40 Gy (%) 30 ± 4 46 ± 24 (0.008) 42 ± 21 (0.01)
  V50 Gy (%) 21 ± 3 33 ± 18 (0.008) 34 ± 19 (0.01)
  V60 Gy (%) 15 ± 2 22 ± 12 (0.006) 25 ± 16 (0.01)
  V70 Gy (%) 7 ± 2 10 ± 5 (0.01) 14 ± 12 (0.02)
Bladder V10 Gy (%) 79 ± 18 76 ± 17 (0.62) 80 ± 17 (0.81)
  V20 Gy (%) 66 ± 18 61 ± 16 (0.39) 63 ± 19 (0.76)
  V30 Gy (%) 51 ± 14 50 ± 13 (0.89) 51 ± 14 (0.81)
  V40 Gy (%) 35 ± 9 37 ± 10 (0.5) 38 ± 9 (0.44)
  V50 Gy (%) 24 ± 6 27 ± 8 (0.23) 28 ± 7 (0.07)
  V60 Gy (%) 16 ± 4 19 ± 5 (0.1) 20 ± 5 (0.01)
  V70 Gy (%) 9 ± 2 10 ± 3 (0.28) 12 ± 3 (0.004)
  1. * PTV, planning target volume.
  2. Each TomoDirect plan (angles A and angles B) was compared with TomoHelical plan.