Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded . There is no focal airspace opacity to suggest pneumonia . There is no pleural effusion or pneumothorax . The heart is top normal . The mediastinal and hilar contours are normal . Healed right rib fractures are redemonstrated .
    OUTPUT:
    
The heart is top normal . There is no evidence of pneumonia .