An explanation of alveolar vs. interstitial opacities, including cardiogenic and noncardiogenic pulmonary edema, and the 3 types of interstitial patterns (reticular, nodular, and reticulonodular). Examples provided of air bronchograms, peribroncial cuffing, Kerley A and B lines, and cephalization. Etiologies of low lung volumes and hyperinflation are also discussed.

Video includes the following image (among others):

Cephalization, downloaded from Radiopaedia.org, originally posted by Charlie ChiaTsong Hsu.

Sources for other images may include Wikimedia Commons, radiologypics.com, and Jose Caceras' wonderful radiology blog: Caceres Corner (http://blog.myesr.org/category/cacere...)