Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Subtle opacities involving the right upper lung and at the left base are similar to the prior examination the may represent indolent infection or possibly aspiration . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
Subtle opacities involving the right upper lung and the left base are similar to the prior examination but new compared to earlier radiographs . Diagnostic considerations include recurrent aspiration , indolent or recurrent infection , and localize scarring . Short - term followup radiographs in 4 weeks are recommended to assess for stability or resolution .