Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is improved aeration in the right mid lung compared to the study performed earlier in the same day . Persistent right hilar mass with persistent opacification the right mid lung . No pleural effusion or pneumothorax . The left lung remains clear . Left chest wall Port - A - Cath in unchanged position .
    OUTPUT:
    
Mildly improved aeration in the right mid lung . No pneumothorax .