Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Large hiatal hernia is present . Heart size is normal . Mild tortuosity of the thoracic aorta is present . There is no pulmonary vascular congestion . Hyperinflation of lungs with flattening of the diaphragms and increased AP diameter of the thorax is compatible with underlying COPD . Streaky bibasilar airspace opacities are nonspecific , and could reflect atelectasis . Infection and aspiration are not excluded . Previously noted left perihilar abnormality has resolved . There is no pneumothorax . No pleural effusion is identified . Diffuse demineralization of the osseous structures is noted with multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
1 . Streaky bibasilar airspace opacities are nonspecific , and could reflect atelectasis or infection . Aspiration is also not excluded . 2 . Large hiatal hernia . 3 . COPD .