Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low , which may be related to respiratory effort . There is associated bronchovascular crowding . No focal consolidation , edema , effusion , or pneumothorax . The heart is normal in size . The mediastinum is not widened . Anterior spinal fusion hardware in the cervical spine is seen on the AP view . Diffuse idiopathic skeletal hyperostosis is noted .
    OUTPUT:
    
Low lung volumes without focal pneumonia .