Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low resulting in mild bibasilar atelectasis . No focal consolidations concerning for pneumonia are identified . There is no pleural effusion , or pneumothorax . The visualized osseous structures , aside from moderate degenerative changes within the thoracic spine , are unremarkable .
    OUTPUT:
    
Low lung volumes . Mild bibasilar atelectasis . No definite consolidations concerning for pneumonia identified .