Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Axial paired computed tomography images at (A) end-inspiration and (B) end-expiration showing expiratory central airway collapse at the level of the aortic arch in a representative subject. The cross-sectional area decreased 70% from end-inspiration to end-expiration.
