Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart size is normal . The aorta remains tortuous . The hilar contours are stable , and there is no evidence of pulmonary edema . The lungs are hyperinflated with flattening of the diaphragms and attenuation of the pulmonary vascular markings towards the upper lobes compatible with emphysema . No focal consolidation , pleural effusion or pneumothorax is noted . There is diffuse demineralization of the osseous structures with multilevel degenerative changes again present within the lower thoracic spine . Additionally , there is minimal loss of height of a low thoracic vertebral body which appears unchanged when compared to the prior CT chest from ___ .
    OUTPUT:
    
Emphysema . No acute cardiopulmonary abnormality .