Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to a remote prior , there has been no significant interval change . There are increased interstitial markings best seen on the lateral view in the retrosternal region and projecting over the cardiac silhouette . There is no new consolidation , or effusion . The cardiomediastinal silhouette is stable . No acute osseous abnormalities .
    OUTPUT:
    
Chronic changes in the lungs dating back to ___ suggesting underlying interstitial process / fibrosis . No superimposed acute cardiopulmonary process .