Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There increased interstitial markings throughout the lungs compatible with patient 's underlying emphysema . There is no superimposed consolidation . Blunting of the left lateral costophrenic angle could be due to atelectasis although small effusion is possible . Cardiac silhouette is moderately enlarged and atherosclerotic calcifications are seen at the arch . Known hiatal hernia is seen in the retrocardiac region . No displaced fractures identified .
    OUTPUT:
    
Increased interstitial markings likely due to patient 's known COPD . Blunting of the left costophrenic angle could be due to atelectasis although small effusion is possible