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.
Chest radiographs on the same patient a few minutes apart showing the effect of technique; the left image shows mediastinal widening and basal clouding due to a poor inspiratory effort; the right image has been taken in good inspiration and looks entirely normal
