Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Diffuse interstitial opacities correspond with patient 's known underlying pulmonary fibrosis . However , compared to the scout image from chest CT from ___ , there are overall increased interstitial opacities . Additionally , there is enlargement of the hilar contours and cardiac silhouette . The above collection of findings suggest superimposed moderate pulmonary edema . Probable small bilateral pleural effusions are also present . No pneumothorax is evident .
    OUTPUT:
    
Probable moderate interstitial pulmonary edema superimposed upon background pulmonary fibrosis . The ddx could include fibrosis with superimposed interstital pneumonia , though this is considered less likely .