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Table 4 Correlation of ΔRGS based on computed tomography scans performed one and four months after radiation therapy with pre-treatment dosimetric parameters (mean ± SD)

From: High-dose thoracic radiation therapy for non-small cell lung cancer: a novel grading scale of radiation-induced lung injury for symptomatic radiation pneumonitis

ΔRGS

MLD (Gy)

V5 (%)

V10 (%)

V20 (%)

V30 (%)

V40 (%)

V50 (%)

V60 (%)

1

12.4 ± 3.2

38.4 ± 7.4

30.6 ± 6.5

25.3 ± 6.0

17.2 ± 6.0

21.6 ± 5.4

17.2 ± 6.0

11.7 ± 5.9

2

15.0 ± 2.8

46.3 ± 11.8

35.8 ± 9.9

30.4 ± 7.6

21.3 ± 5.5

26.8 ± 5.8

21.3 ± 5.5

15.4 ± 6.3

3

16.5 ± 2.5

52.8 ± 1.8

41.2 ± 0.2

30.6 ± 5.5

22.5 ± 6.4

26.9 ± 6.3

22.5 ± 6.4

19.1 ± 5.3

0

15.6 ± 3.1

48.7 ± 9.8

36.1 ± 5.6

30.5 ± 4.8

22.7 ± 6.4

27.3 ± 5.2

22.6 ± 6.4

16.6 ± 5.4

P value

0.03

0.02

0.08

0.15

0.15

0.05

0.15

0.12

  1. RGS, radiation-induced lung injury grading scale; ΔRGS, change in RGS on computed tomography scans performed one and four months after radiation therapy; MLD, mean lung dose; Vx (%), percent of the total lung volume receiving X Gy