Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - aerated and clear . No pleural abnormality is seen . The heart is mildly enlarged . Enlargement of the mediastinal silhouette is likely due to body habitus . The hilar contours are unremarkable . No pleural effusion , edema or pneumonia .
    OUTPUT:
    
No pleural effusion , edema or pneumonia .