Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The trachea is midline ; in the neck the airway may taper proximally . The lungs are relatively clear bilaterally , the mediastinum is normal limits . Heart is normal size . No pneumothorax is seen .
    OUTPUT:
    
1 . Upper trachea was normal neck CT done ___ . If referable clinical findings have developed subsequently , CT would be needed to assess possible tapering of tracheal airway in the neck .