Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The mediastinal and hilar contours appear within normal limits . The lungs appear clear . There are no pleural effusions or pneumothorax . Slight degenerative changes are noted along the lower thoracic spine . Surgical clips projecting over the right upper quadrant of the abdomen are likely associated with prior cholecystectomy .
    OUTPUT:
    
Mild cardiomegaly . No evidence of acute disease .