Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal silhouette is unremarkable . Hilar contours are unchanged since ___ . Areas of right greater than left biapical linear probable scarring are unchanged since prior examination . There are slight increased opacities in the right medial lung base . There is mild bibasilar atelectasis . Lungs are otherwise clear . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
Chronic changes in the lung apices along with mildly increased right medial base opacities which could represent parenchymal component of sarcoidosis , atelectasis or possibly subtle infection given the appropriate clinical circumstance .