Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Diffuse interstitial opacities , predominantly in the right lung base and probably very mild in the left lung base are present . When compared to the prior chest CT from ___ , these interstitial opacities appear new , and given the clinical history , likely represent lung infection ( atypical viral ) or asymmetric pulmonary edema . In view of history , a possibility of lymphangitic carcinomatosis also needs to be ruled out . Compared with prior radiograph from ___ , a dense opacity in the left perihilar region , likely radiation fibrosis has significantly improved over ___ to ___ , as demonstrated on series of chest CT 's . Heart size is mildly larger and unchanged . Irregularity of the hilar and mediastinal border is likely postradiation . Ill - defined opacity in the left mid lung corresponds to scarring and atelectasis , as suggested on review of chest CT from ___ . Pleural effusion , if any , is minimal bilaterally . Bilateral lower lung bases are remarkable for mild atelectasis .
    OUTPUT:
    
1 . Diffuse interstitial opacities in the right lung and very mild in left lung base , in view of history most likely reflect lung infection or asymmetric pulmonary edema . A possibility of lymphangitic spread of malignancy also needs to be ruled out in view of clinical history . 2 . Irregularity of the mediastinal and hilar contours is attributed to the postradiation changes . 3 . Ill - defined opacity in the left mild lung is likely atelectasis / scarring as suggested from a concurrent review of ___ CT . Follow - up radiograph is recommended at 4 wks to monitor changes . Above findings were discussed with Dr . ___ on ___ at 5 :45 p .m .