Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The hilar and mediastinal contours are within normal limits . There is no pneumothorax , focal consolidation , or pleural effusion . Mild linear bibasilar atelectasis is present . There is mild bilateral bronchial wall thickening which may represent a lower respiratory infection or small airways disease such as asthma .
    OUTPUT:
    
No pneumonia . Mild bibasilar atelectasis . Mild bronchial wall thickening suggestive of a non-bacterial lower respiratory infection or mild small airways disease .