Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is tortuous . The mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . Punctate calcification in the lung bases along with coarse reticular opacities are again noted , potentially due to chronic aspiration . Increased retrocardiac patchy opacity may reflect atelectasis , without focal consolidation . No pleural effusion or pneumothorax is present . Scarring within the lung apices is unchanged .
    OUTPUT:
    
Increased patchy retrocardiac opacity , likely atelectasis , without focal consolidation . Unchanged coarse reticular bibasilar opacities with punctate calcifications , findings which may be due to chronic aspiration .