Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild increased reticular opacities in the right middle lobe , possibly from atelectasis or scarring is persistent and unchanged ___ . Otherwise , the lungs are well expanded and clear . No pleural abnormality is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
No pneumonia . Unchanged right middle lobe opacity , likely scarring or atelectasis .