Fig. 1
From: Dual-energy computed tomography in the early evaluation of acute radiation pneumonia
TPS localization map; a shows the transverse localization map of the patient with esophageal cancer; b shows the coronal localization map of another patient, where the green line is the V20 dose line, the yellow line is the V10 dose line, and the red line is the V5 dose line, and the numbered zone 1 is the > 20 Gy dose irradiation range, marked as V>20 Gy; zone 2 is the 10–20 Gy dose irradiation range, marked as V10-20 Gy; zone 3 is the 5–10 Gy dose irradiation range, marked as V5-10 Gy; zone 4 is the < 5 Gy dose irradiation range, marked as V<5 Gy