Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior film , and allowing for differences in positioning , the cardiomediastinal silhouette is unchanged . Again seen is dense retrocardiac opacity consistent with left lower lobe collapse and / or consolidation . The hazy opacity at the left lung base is not appreciated on the current film , question interval resolution . There is new increased density at the right lung base , which could represent a combination of pleural fluid and underlying collapse and / or consolidation , not fully characterized on this single view . There is upper zone redistribution and mild vascular blurring , consistent with CHF . This is probably slightly improved . No pneumothorax is detected .
    OUTPUT:
    
Persistent left lower lobe collapse and / or consolidation , though the more hazy component seen on yesterday 's film has resolved . It is possible this latter finding represented alveolar edema related to CHF . New opacity at the right lung base , not fully characterized , but could represent a combination of pleural fluid and underlying collapse and / or consolidation . Given differences in patient positioning between the 2 films , some of this could reflect extension of the cardiac silhouette , but that likely does not account for the entire opacity . Mild CHF , improved compared with the film from 1 day earlier .