Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: 2 views were obtained of the chest . Diffuse left - greater - than - right interstitial prominence is keeping with known history of interstitial lung disease . The most confluent opacity remains in the left base and does not appear significantly changed from previous examination . There is no pleural effusion or pneumothorax . Heart and mediastinal contours are unchanged with calcified aortic arch .
    OUTPUT:
    
Diffuse left - greater - than - right pulmonary fibrosis without definite new opacity to suggest infectious process .