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 . Linear opacity in the lingula is compatible with subsegmental atelectasis . Remainder of the lungs are clear . No focal consolidation , pleural effusion or pneumothorax is seen . No acute osseous abnormality is detected .
    OUTPUT:
    
Subsegmental atelectasis in the lingula . Otherwise , no acute cardiopulmonary abnormality .