Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyper - expanded and show bilateral interstitial and focal airspace opacities . The cardiac silhouette and main pulmaonary atery are enlarged . There is blunting of the right posterior costophrenic angle , which could reflect a small effusion . No pneumothorax is present . A left - sided pacer terminates with its leads in the right atrium and right ventricle .
    OUTPUT:
    
Increased interstial markings and ? small right pleural effusion , consistent with mild pulmonary edema .