A-C: Axial, coronal, and sagittal CTA images demonstrate a large filling defect in the main right pulmonary artery consistent with a large pulmonary embolism. Source: Chapter 5. Atraumatic Conditions of the Chest, The Atlas of Emergency Radiology Citation: Block J, Jordanov MI, Stack LB, Thurman R. The Atlas of Emergency Radiology; 2013 Available at: http://accessemergencymedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/bloc1/bloc1_c005f061b.png&sec=42497541&BookID=573&ChapterSecID=42496367&imagename= Accessed: December 20, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved