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A: NECT shows air-fluid levels in both maxillary sinuses with locules of air trapped within the fluid suggestive of acute sinusitis. B: Waters view of skull shows air-fluid levels with bubbly secretions in the right frontal and maxillary sinuses suggesting acute sinusitis. Source: Chapter 2. Atraumatic Conditions of the Head and Face, The Atlas of Emergency Radiology Citation: Block J, Jordanov MI, Stack LB, Thurman R. The Atlas of Emergency Radiology; 2013 Available at: http://mhmedical.com/ Accessed: June 10, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved