Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is scarring in the left suprahilar region with upward retraction and a suture line suggesting prior partial lung resection . The lung architecture is also coarse and heterogeneous , particularly in the upper lungs on the left , which may suggest scarring or potentially emphysema in the upper lungs . Streaky opacity again partly obscures the right costophrenic sulcus ; slight upward tenting of the left hemidiaphragm is also unchanged and suggests slight scarring . The lungs are hyperinflated . Mild degenerative changes along the thoracic spine are similar . No free air is seen .
    OUTPUT:
    
Findings suggesting underlying emphysema . Similar post-operative changes in the left upper hemithorax . No evidence of acute disease .