Skip to main content
. 2014 May 21;9:119. doi: 10.1186/1748-717X-9-119

Table 1.

Summary of dose volume histogram analysis for GTV, brain stem and ipsilateral cochlea for VS patients

 
 GK_1
 GK_2
 TB_1
 TB_2
 p
  PTV vol [cm 3 ]: 4.22 ± 2.85 Range: [1.20; 8.50]
Mean [Gy]
 17.1 ± 0.9
 17.1 ± 0.8
 12.9 ± 0.1
 16.0 ± 0.6
 a, b, c, d
D2% [Gy]
 22.7 ± 1.2
 23.0 ± 0.8
 13.4 ± 0.2
 18.8 ± 1.1
 a, b, c, d
D98% [Gy]
 12.25 ± 0.0
 12.25 ± 0.0
 12.25 ± 0.0
 12.25 ± 0.0
 n.s.
St. dev [Gy]
 2.7 ± 0.3
 2.8 ± 0.2
 0.3 ± 0.1
 1.7 ± 0.3
 a, b, c, d
Homogeneity [%]
 51.7 ± 3.5
 51.8 ± 1.2
 6.4 ± 1.5
 35.0 ± 4.9
 a, b, c, d
PCI
 0.81 ± 0.03
 0.78 ± 0.04
 0.83 ± 0.07
 0.84 ± 0.04
 c, d
PGI
 2.7 ± 0.2
 2.8 ± 0.2
 5.1 ± 0.7
 3.8 ± 0.6
 a, b, c, d
DGM [cm]
 0.4 ± 0.1
 0.4 ± 0.1
 0.6 ± 0.1
 0.5 ± 0.1
 a, b, c, d
 
 Brain stem vol [cm 3 ] = 21.50 ± 8.37 Range: [8.69; 32.70]
D1cm3 [Gy]
 5.1 ± 2.0
 5.4 ± 2.2
 5.7 ± 2.1
 4.8 ± 1.6
 n.s.
V8Gy [%]
 1.9 ± 1.7
 2.3 ± 1.8
 2.5 ± 1.9
 1.1 ± 1.0
 a, b, d
V10Gy [%]
 0.6 ± 0.5
 0.8 ± 0.6
 0.8 ± 0.7
 0.2 ± 0.2
 a, b, d
V12Gy [%]
 0.1 ± 0.1
 0.2 ± 0.2
 0.03 ± 0.04
 0.01 ± 0.01
 a
 
 Ipsilateral cochlea vol [cm 3 ] = 0.10 ± 0.01 Range: [0.02;0.13]
Mean [Gy]
 6.6 ± 2.9
 3.3 ± 0.8
 5.5 ± 2.2
 4.1 ± 0.9
 a, b, c
D0.1cm3 [Gy]
 4.0 ± 1.8
 1.7 ± 1.0
 3.1 ± 1.2
 1.8 ± 0.5
 a, b, c
D30% [Gy] 7.3 ± 3.2 3.6 ± 0.8 6.2 ± 2.4 4.7 ± 1.1 a, b, c, d

Statistical significance p: a = GK_1 vs TB_1, b = GKv vs TB_2, c = GK_2 vs TB_1, d = GK_2 vs TV_2; n.s. = not significant. PCI = Paddick Conformity Index, PGI = Paddick Gradient Index, DGM = Dose Gradient measure. Dx% = Dose at x% of the volume.