Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear without focal consolidation , pleural effusion , or pneumothorax . Cardiac silhouette is top normal size , but unchanged from ___ allowing for differences in technique and is exaggerated by a narrow AP diameter of the chest . Mediastinal silhouette and hilar contours are normal .
    OUTPUT:
    
No pneumonia , edema , or effusion .