Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung apices are hyperlucent , compatible with chronic obstructive airways disease . Discoid atelectasis has developed at both lung bases . There is partial silhouetting of the hemidiaphragms , and superimposed infection can not be excluded . Small bilateral pleural effusions are present . There is no pneumothorax . Heart size is normal .
    OUTPUT:
    
1 . Bibasilar atelectasis and small effusions . 2 . Emphysema .