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Table 2 Thoracic wall target volume

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

  TomoHelical TomoDirect p- value
   (Mean ± standard deviation)  
Patient number 9 (Tangential: 6, 3 ports: 3)  
PTV* (cc) 365 ± 319  
Modulation factor 1.8 - 2.0  
Pitch 0.25 - 0.287  
Field width 2.5 - 5.02  
Conformity index 2.21 ± 0.14 4.63 ± 0.61 0.004
Uniformity index 1.07 ± 0.04 1.06 ± 0.02 0.93
D95% 96 ± 1 97 ± 1 0.04
Time (sec) 259 ± 39 271 ± 34 0.72
Lung MLD(Gy) 6 ± 1 3 ± 1 0.05
  V5 Gy (%) 44 ± 8 19 ± 6 0.02
  V10 Gy (%) 22 ± 5 12 ± 4 0.38
  V20 Gy (%) 6 ± 1 6 ± 2 0.85
  V30 Gy (%) 2 ± 1 3 ± 1 0.65
Cord (maximum dose) 12 ± 3 7 ± 8 0.11
  1. *PTV, planning target volume.
  2. MLD, mean lung dose.