Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded . Mild peribronchiolar wall thickening could suggest small airways disease or viral infection in the appropriate clinical situation . No edema , effusion , pneumothorax , or focal consolidation . The heart is normal in size . The mediastinum is not widened . No acute osseous lesion .
    OUTPUT:
    
1 . No focal pneumonia . 2 . Possible mild small airways disease or viral infection in the appropriate clinical situation .