Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates interval improved aeration in the right lung base . There is persistent dense retrocardiac opacity compatible with atelectasis or consolidation . A small left pleural effusion may be present . Upper lungs are well aerated . The left subclavian approach central venous catheter is stable in position with tip in the upper SVC . Osseous injuries are better delineated on prior CT dated ___ .
    OUTPUT:
    
Improved right lower lobe aeration .