Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear opacity in the left lingula and lower lobe corresponds to scarring from known radiation changes . Fullness in the right paratracheal region also corresponds to post radiation changes . The cardiac and mediastinal contours are normal . There is no pleural or pericardial effusion .
    OUTPUT:
    
No new focal opacity concerning for pneumonia .