Tracheobronchial tree
Trachea coronal diameter / sagittal diameter ratio
>0.6
Radiography
X-ray computed tomography
A coronal:sagittal ratio <0.6 is suggestive of saber-sheath trachea deformity.
Reference
Brant WE, M.D. CA. Fundamentals of Diagnostic Radiology. LWW. (2012).
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