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. 2021 Feb 2;10:611514. doi: 10.3389/fonc.2020.611514

Table 2.

Summary of the target volume dosimetry.

IMRT VMAT HT IMPT-1 IMPT-2 P < 0.05
D2(Gy) 13.2 ± 0.1 13.1 ± 0.07 12.7 ± 0.1 13.0 ± 0.4 14.74 ± 1.24 a,b,d,f,g,h,i,j
D98(Gy) 11.8 ± 0.1 11.8 ± 0.2 12.0 ± 0.1 11.9 ± 0.5 11.84 ± 0.09 b,f, g,h,j
Dmax(Gy) 14.1 ± 0.3 13.6 ± 0.2 13.0 ± 0.1 14.6 ± 0.7 21.81 ± 3.93 a,b,c,d,e,f,g,h,i,j
Dmean(Gy) 12.6 ± 0.03 12.6 ± 0.007 12.5 ± 0.1 12.6 ± 0.001 12.75 ± 0.14 b,d,f,g,h,i,j
Dmin(Gy) 8. 4 ± 1.2 5.6 ± 2.0 10.2 ± 0.4 6.6 ± 2.4 6.31 ± 1.72 a,b,c,d,e,f, g,i
Target coverage(%) 96.2 ± 0.4 96.2 ± 1.3 98.2 ± 0.5 96.0 ± 0.8 96.36 ± 1.03 b,f,i
CI 0.86 ± 0.02 0.84 ± 0.03 0.84 ± 0.03 0.84 ± 0.03 0.80 ± 0.05 b,g,j
HI 0.1 2 ± 0.01 0.11 ± 0.02 0.05 ± 0.01 0.10 ± 0.07 0.24 ± 0.11 b,d,f, g,h,i,j

IMRT, intensity-modulated radiation therapy; VMAT, volumetric-modulated arc therapy; HT, helical tomotherapy; IMPT, intensity-modulated proton therapy; Dx, dose received by x% of the volume; CI, conformity index; HI, homogeneity index; a, IMRT vs VMAT; b, IMRT vs HT; c, IMRT vs PT; d, VMAT vs HT; e, VMAT vs PT; f, HT vs PT; g, IMRT vs IMPT-2; h, VMAT vs IMPT-2; I, HT vs IMPT-2; j, IMPT-1 vs IMPT-2.