Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The degree of interstitial abnormality has slightly improved on the left when compared to prior with persistent infrahilar and retrocardiac opacities . Hazy opacity projects in the right lung somewhat overall conspicuous compared to prior however appears more diffuse in distribution . There is no effusion . The cardiomediastinal silhouette is unchanged . No acute osseous abnormality is detected .
    OUTPUT:
    
Improvement in the appearance of the left lung with residual infrahilar retrocardiac opacity compared to prior . Opacities in the right lung overall appear less dense when compared to prior but are more extensive in distribution . Findings again compatible with chronic underlying lung disease with potentially superimposed acute component or infection on the right .