Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . The aorta is tortuous . Pulmonary vascularity is normal . Hilar contours are unremarkable . Linear bibasilar opacities are compatible with subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . Multilevel degenerative changes are noted in the thoracic spine . Mild loss of height anteriorly of a mid thoracic vertebral body is noted . No displaced fractures are seen within the ribs .
    OUTPUT:
    
1 . Bibasilar linear atelectasis . 2 . Mild loss of height anteriorly of a mid thoracic vertebral body , age indeterminate . No displaced rib fractures are seen . If there is continued clinical concern for a rib fracture , then a dedicated rib series is recommended .