Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior film , increased retrocardiac opacity has improved somewhat , with renewed visualization of the left hemidiaphragm . Residual opacity remains present . Otherwise , I doubt significant interval change . Again seen is marked cardiomegaly , with unfolding of the aorta , Upper zone redistribution with mild vascular engorgement is unchanged . Patchy opacity at the right base medially is similar to the prior film . Minimal , if any , left pleural fluid . No gross right effusion . No pneumothorax detected . Note is made of surgical clips about the trachea bilaterally at the level of thoracic inlet .
    OUTPUT:
    
1 . Interval improvement in left lower lobe collapse and / or consolidation . Residual retrocardiac opacity persists . 2 . Otherwise , I doubt significant interval change . Upper zone redistribution and mild vascular engorgement is unchanged . No gross effusions are detected .