Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Opacification in the right lower lung persists , although perhaps minimally improved , suggesting chronic aspiration . The left lung is clear . The heart is top - normal in size . No pleural effusion or pulmonary edema . The descending aorta is tortuous or slightly ectatic , similar to the prior exam .
    OUTPUT:
    
Minimally improved right lower lung opacity , suggesting chronic aspiration .