Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . Minor atelectasis in the right middle lobe is associated with a prominent epicardial fat pad . Elsewhere , the lungs appear clear . A nondisplaced fracture involves the right posterior lateral fifth rib which is unchanged . There has been no significant change .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .