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. 2013 Nov 9;8:264. doi: 10.1186/1748-717X-8-264

Table 3.

Comparison of OARs’ doses calculated from PVP, HAP and non-enhanced CTs

  Dp Da Dn P(p,a,n)* (Dn-Dp)/Dn (%) P(p,n)# (Dn-Da)/Dn (%) P(a,n)# (Da-Dp)/Dn (%) P(p,a)#
3D-CRT
  
  
  
  
  
  
  
  
  
  
Liver V21 (%)
 12.77 ± 11.45
 12.87 ± 11.53
 12.94 ± 11.55
 0.000
 1.70 ± 1.50
 0.000
 0.90 ± 1.20
 0.000
 0.80 ± 0.85
 0.000
Liver Dmean (Gy)
 8.52 ± 5.00
 8.57 ± 5.03
 8.61 ± 5.04
 0.000
 1.02 ± 0.73
 0.000
 0.51 ± 0.64
 0.000
 0.52 ± 0.47
 0.000
Right kidney D2%(Gy)
 13.59 ± 14.36
 13.60 ± 14.35
 13.69 ± 14.48
 0.000
 0.56 ± 1.29
 0.000
 0.33 ± 1.10
 0.001
 0.23 ± 0.58
 0.140
Right kidney Dmean (Gy)
 2.87 ± 3.47
 2.87 ± 3.47
 2.89 ± 3.50
 0.201
 -0.09 ± 1.01
 -
 0.18 ± 0.81
 -
 -0.27 ± 0.53
 -
Bowl D2% (Gy)
 12.83 ± 8.63
 12.84 ± 8.65
 12.86 ± 8.72
 0.040
 -0.31 ± 2.50
 0.254
 -0.13 ± 2.27
 0.074
 -0.18 ± 1.13
 0.268
Stomach D2% (Gy)
 16.42 ± 7.62
 16.54 ± 7.66
 16.65 ± 7.69
 0.000
 1.45 ± 2.33
 0.003
 0.71 ± 1.40
 0.004
 0.74 ± 1.31
 0.001
Spinal cord D2% (Gy)
 11.28 ± 6.79
 11.31 ± 6.79
 11.36 ± 6.81
 0.006
 0.73 ± 1.38
 0.000
 0.46 ± 0.88
 0.004
 0.27 ± 1.06
 0.234
IMRT
  
  
  
  
  
  
  
  
  
  
Liver V21 (%)
 25.31 ± 6.90
 25.35 ± 6.89
 25.39 ± 6.87
 0.040
 0.38 ± 0.87
 0.046
 0.19 ± 0.68
 0.338
 0.19 ± 0.43
 0.026
Liver Dmean (Gy)
 10.00 ± 4.95
 10.05 ± 4.99
 10.09 ± 4.99
 0.000
 0.97 ± 0.77
 0.000
 0.49 ± 0.74
 0.000
 0.48 ± 0.46
 0.000
Right kidney D2% (Gy)
 14.71 ± 14.88
 14.71 ± 14.89
 14.82 ± 15.02
 0.003
 0.32 ± 1.22
 0.002
 0.30 ± 1.21
 0.006
 0.01 ± 0.50
 0.050
Right kidney Dmean (Gy)
 3.04 ± 3.12
 3.03 ± 3.12
 3.06 ± 3.15
 0.090
 0.02 ± 1.00
 -
 0.29 ± 0.84
 -
 -0.27 ± 0.54
 -
Bowl D2% (Gy)
 10.99 ± 6.88
 11.02 ± 6.90
 11.09 ± 6.93
 0.000
 0.90 ± 0.86
 0.000
 0.65 ± 0.88
 0.002
 0.26 ± 0.69
 0.178
Stomach D2% (Gy)
 11.73 ± 6.99
 11.80 ± 7.03
 11.85 ± 7.07
 0.000
 0.89 ± 1.90
 0.012
 0.39 ± 1.23
 0.008
 0.50 ± 1.28
 0.002
Spinal cord D2% (Gy)
 9.09 ± 4.50
 9.12 ± 4.49
 9.17 ± 4.50
 0.003
 0.99 ± 1.64
 0.003
 0.57 ± 1.13
 0.001
 0.42 ± 0.95
 0.195
VMAT
  
  
  
  
  
  
  
  
  
  
Liver V21 (%)
 20.71 ± 7.27
 20.75 ± 7.27
 20.77 ± 7.26
 0.017
 0.35 ± 0.71
 0.018
 0.14 ± 0.47
 0.355
 0.21 ± 0.34
 0.005
Liver Dmean (Gy)
 10.10 ± 5.24
 10.16 ± 5.28
 10.20 ± 5.29
 0.000
 0.97 ± 0.67
 0.000
 0.45 ± 0.59
 0.000
 0.52 ± 0.43
 0.000
Right kidney D2% (Gy)
 14.30 ± 14.80
 14.33 ± 14.83
 14.41 ± 14.87
 0.000
 0.68 ± 1.08
 0.000
 0.38 ± 0.89
 0.000
 0.31 ± 0.48
 0.000
Right kidney Dmean (Gy)
 3.34 ± 3.55
 3.34 ± 3.55
 3.36 ± 3.56
 0.187
 -0.03 ± 1.03
 -
 0.14 ± 0.76
 -
 -0.17 ± 0.41
 -
Bowl D2% (Gy)
 11.87 ± 7.28
 11.90 ± 7.32
 11.98 ± 7.35
 0.000
 0.95 ± 0.87
 0.000
 0.81 ± 1.02
 0.001
 0.14 ± 0.94
 0.206
Stomach D2% (Gy)
 11.53 ± 8.30
 11.65 ± 8.47
 11.65 ± 8.40
 0.000
 0.78 ± 1.60
 0.001
 0.08 ± 1.95
 0.031
 0.70 ± 1.12
 0.000
Spinal cord D2% (Gy) 9.92 ± 3.79 9.93 ± 3.79 9.95 ± 3.80 0.013 0.24 ± 1.18 0.010 0.21 ± 0.56 0.031 0.04 ± 0.77 0.081

Abbrevations: V21, the percentage liver volume received more than 21 Gy; Dmean, the mean dose; D2%, the minimum absorbed dose that covers 2% of the volume of a certain OAR. The others as in Table 2. *, Friedman test; #, Wilcoxon signed ranks test.