Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs remain hyperinflated with slight increased AP diameter of the chest , unchanged . Subtle increased opacity in the right infrahilar region on only the frontal view may represent overlap of superimposed structures or atelectasis ; however , aspiration and / or early bronchopneumonia can not be excluded in the appropriate clinical situation . The left lung is clear . No pleural effusion , edema , or pneumothorax . The heart is normal . The mediastinum is not widened . Biapical mild pleural thickening / scarring is unchanged . Mild atelectasis and / or scarring at the left costophrenic angle is also unchanged . Dextroconvex scoliosis of the lower thoracic spine is unchanged . Degenerative changes in the thoracic spine are unchanged .
    OUTPUT:
    
1 . Subtle increased opacity in the right infrahilar region probably reflects superimposed normal structures and / or atelectasis . However , early bronchopneumonia can not be excluded in the appropriate clinical situation . 2 . Hyperinflated lungs with widening of AP diameter compatible with history of chronic pulmonary disease .