Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unremarkable . The pulmonary vascularity is normal . Linear opacity within the left lower lobe is compatible with subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is visualized . Mild loss of height of a mid thoracic vertebral body is noted anteriorly , but age indeterminate .
    OUTPUT:
    
Mild anterior wedge deformity of a mid thoracic vertebral body , age indeterminate . Subsegmental atelectasis in the left lower lobe .