Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to prior , there are persistent but potentially slightly less conspicuous bilateral increased interstitial markings throughout the lungs . There is no new consolidation or effusion . The cardiomediastinal silhouette is enlarged but stable . No acute osseous abnormalities identified , compression deformities in the thoracic spine were better seen on prior exam . Old mid left clavicular fracture is again noted .
    OUTPUT:
    
Perhaps mild interval improvement in the appearance of the increased interstitial markings throughout the lungs which persist . No new consolidation .