Fig. 2.
From: A case of asymptomatic complete tracheal rings in an adult: case report
CT imaging of complete tracheal rings. a Preoperative axial CT imaging of tracheal rings (arrow). b Postoperative coronal CT reconstruction (arrow). The tracheal diameter at the site of transition to complete tracheal rings was slightly smaller than at the cricoid cartilage level. However, there was no significant stenosis