Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is normal . Eventration of the hemidiaphragms bilaterally is re - demonstrated . Linear opacity in the left mid lung field is compatible with scarring or subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . There are moderate multilevel degenerative changes demonstrated in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .