Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient 's chin obscures the medial portion of both lung apices . Retro density may be slightly increased , consistent with slight progression of left lower lobe collapse and / or consolidation . Diffuse increased interstitial markings probably similar allowing for technical differences . Cardiomediastinal silhouette is partially obscured by the left base opacity , but appears grossly unchanged . Right - sided dual lead pacemaker similar prior . Overlies the lower portion of the right lung . Allowing for this , no right lung frank consolidation . No right effusion . Minimal blunting of left costophrenic L could reflect a small left effusion .
    OUTPUT:
    
Diffuse interstitial markings are similar to the prior film . These are similar , but increased compared with ___ , raising the possibility of an acute on chronic process . Allowing for technical differences , they do not appear significant change compared with ___ . Slight progression in left lower lobe collapse and / or consolidation . Small left effusion .