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Table 2 Comparisons of the DVH-based parameters of the PTV in present study (n = 12).

From: Planning analysis for locally advanced lung cancer: dosimetric and efficiency comparisons between intensity-modulated radiotherapy (IMRT), single-arc/partial-arc volumetric modulated arc therapy (SA/PA-VMAT)

 

IMRT

SA-VMAT

PA-VMAT

 

mean ± SD

mean ± SD

p valuea

mean ± SD

p value b

p value c

Dmind

(Gy)

62.4 ± 1.5

63.2 ± 1.3

0.179

62.5 ± 1.4

0.908

0.217

Dmaxd (Gy)

73.9 ± 1.6

73.4 ± 1.5

0.492

73.8 ± 1.6

0.919

0.555

Dmeand (Gy)

68.9 ± 1.5

68.9 ± 1.4

0.949

68.8 ± 1.5

0.840

0.783

CIe

0.62 ± 0.07

0.68 ± 0.06

0.019

0.62 ± 0.06

0.819

0.025

HIf

1.15 ± 0.04

1.11 ± 0.04

0.027

1.15 ± 0.04

0.727

0.043

  1. a: compared with the parameters of IMRT; b: compared with the parameters of IMRT; c: compared with the parameters of SA-VMAT; d: the minimum, maximum and mean irradiation dose of the PTV, respectively; e: conformity index, calculated with the fomula as we applied previously [13]; f: homogeneous index, calculated with the fomula: "HI = D5/D95";