Preoperative and Postoperative CT Imaging Assessment of Obstructive Sleep Apnea.

Obstructive sleep apnea (OSA) can result from various causes of partial or complete obstruction of the upper airway. CT is amenable to quantitative analysis of the upper airway and surrounding structures. CT is also useful for identifying abnormalities that could be attributed to the patient's symptoms and is relevant for surgical planning. There are various surgical procedures that can be performed for OSA that can also be encountered on CT. The relevant anatomic measurements, imaging features of various pathologies that can affect the upper airway, and postoperative imaging for OSA are reviewed in this article.