Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . The lungs are hyperexpanded , with slight flattening of the hemidiaphragms and expansion of the retrosternal airspace , suggestive of chronic obstructive pulmonary disease . Minimal atelectasis is seen within the left mid-to - lower lung . The lungs are otherwise clear . The heart size is normal . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen . Multilevel degenerative changes of the thoracolumbar spine are noted .
    OUTPUT:
    
1 . No acute cardiac or pulmonary process . 2 . Findings suggestive of chronic obstructive pulmonary disease and should be correlated to any history of smoking .