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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