Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest again demonstrate coarse interstitial opacities throughout both lungs . As compared to prior chest CT from ___ , there is no change . As compared to ___ , there is no change . The abnormality is diffuse , involving both upper lobes and the right middle lobe , and may be COP , but is likely not an infectious process due to its stability over time . The appearance on the current radiograph is attributable to scarring . No focal consolidation is identified . No pneumothorax or pleural effusion is seen . The cardiac and mediastinal contours are within normal limits . Mild biapical thickening is also noted .
    OUTPUT:
    
Stable chronic bilateral interstitial opacities with no evidence of acute consolidation .