Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta remains tortuous . Mediastinal and hilar contours are stable . Pulmonary vasculature is normal . Minimal subsegmental atelectasis is noted in the lingula . Mild elevation of the right hemidiaphragm is unchanged . Right axillary clips and tissue expander within the right chest wall are noted . Mild degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .