Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs were acquired . As before , there is hyperinflation of the lungs with flattening of the hemidiaphragms and widening of the retrosternal airspace , consistent with COPD . Aside from minimal bibasilar linear atelectasis , the lungs are clear . The cardiac and mediastinal contours are normal . There are no definite pleural effusions . No pneumothorax . Minimal biapical pleural thickening is unchanged .
    OUTPUT:
    
Minimal bibasilar atelectasis , COPD .