Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior radiographs on ___ , there is an interval improvement in the left lower lobe opacity . There is an oval opacity projecting over the left lower lung which correlates with a healed posterior eighth rib fracture seen on CT on ___ . There is no new focal consolidation . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unchanged .
    OUTPUT:
    
Interval improvement in left lower lobe opacity .