Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Coarsened reticular interstitial markings noted which could reflect underlying emphysema or fibrotic lung disease . Perihilar linear densities could represent scarring as these appear stable from prior exam . No large effusion or pneumothorax . The heart size is normal . The mediastinal contour is unremarkable . Bony structures are intact .
    OUTPUT:
    
Coarsened interstitial markings could reflect emphysema / fibrosis . Areas of perihilar scarring unchanged . No acute findings .