Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are overinflated , with a biapical hyperlucency and vascular attenuation . Stable streaky opacities at the lung bases , left greater than right . There is chronic scarring in the subpleural right upper lobe . Heart size is normal . No pleural effusions or pneumothorax . Degenerative changes in the mid - to - lower thoracic spine , with anterior bridging osteophytes .
    OUTPUT:
    
1 . Chronic obstructive airways disease . 2 . Bibasilar atelectasis .