Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Direct comparison to the prior chest radiograph is somewhat limited due to obliquity of patient positioning . However , the left lower lung opacity appears to be improved , particularly on lateral view . The heart size is stable . No pulmonary edema or pneumothorax .
    OUTPUT:
    
Direct comparison is somewhat limited due to patient positioning . However , left lower lung opacity appears improved .