Fig. 2
Predicted probability of Symptomatic Radiation Pneumonitis by Radiation Dose. Abbreviations: MLD = Mean Lung Dose; Vdose is the percent of lung receiving greater than or equal to “dose” (in Gy). Symptomatic Radiation Pneumonitis = RTOG G3+ or CTCAE G2–3+ RP. Plots show predicted probabilities of symptomatic radiation pneumonitis associated with percentage of lung exposed for various dosimetric values, derived from logistic regressions, for a) Mean Lung Dose, b) Total Lung Values and c) Volume of lung receiving 12.4 Gy and 13.5 Gy in cubic centimeters. Probabilities of 20, 33, and 50% are indicated with reference lines. Points on each curve represent individual patient data