Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is enlarged but unchanged . There is a retrocardiac opacity which may reflect atelectasis or consolidation . The previously described scattered bilateral consolidations were better appreciated on the prior CT scan . No pneumothorax identified .
    OUTPUT:
    
Increased retrocardiac opacity which may reflect atelectasis or consolidation . The known bilateral diffuse patchy consolidations were better evaluated on the recent CT scan of the chest .