Fig. 4
From: Dual-energy computed tomography in the early evaluation of acute radiation pneumonia
Female/63 years old, upper segment esophageal cancer; a Dual-energy lung window image before radiotherapy, the NIC value of the upper left lung is 0.166; b Lung PBV color image before radiotherapy, blood flow (red part) is more abundant in bilateral irradiated fields; c Dual-energy lung window image after radiotherapy, the NIC value of the upper left lung is 0.086; d Lung PBV color image after radiotherapy, blood flow (red part) is less than before. e CT image during follow-up period, ARP is seen in both upper lungs; f TPS coronal localization image, the region of V>20 Gy irradiation is within the green line, and ARP is seen in the region