Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The bones appear demineralized . Mild - to - moderate degenerative changes are noted along the thoracic spine .
    OUTPUT:
    
1 . Patchy bibasilar opacities , probably compatible with atelectasis , although pneumonia is difficult to entirely exclude . The findings are not very typical of aspiration pneumonia . 2 . Nonspecific air - fluid levels in the right upper quadrant , probably colonic . 3 . Moderate relative elevation of the right hemidiaphragm . 4 . Enlarged main pulmonary artery , which may be associated with pulmonary hypertension .