Gregory Aaron Bonci MD, Presenter: Nothing to Disclose

Jeremy Robert Wortman MD, Abstract Co-Author: Nothing to Disclose

Urvi Pravin Fulwadhva MD, Abstract Co-Author: Nothing to Disclose

Aaron D. Sodickson MD, PhD, Abstract Co-Author: Research Grant, Siemens AG

Dual energy (DE) imaging is based on the principle that different materials exhibit distinct absorption characteristics at different x-ray energies. DE three-material decomposition enables calculation of iodine content in tissues, which may be displayed as an iodine map or removed to display a virtual noncontrast (VNC) image. Areas of contrast extravasation questioned or not optimally visualized on conventional CT imaging can be reliably identified based on the presence of iodine content. This allows for confident diagnosis without the need for additional non-contrast or delayed post-contrast scans.    

1. Dual Energy Physics Principles of DE CT and three-material decomposition. Generation of VNC imaging and determination of iodine content. 2. Applications in the ER Setting The identification of active extravasation is of particular importance in the emergency setting. Hyperdense foci on CT that represent active hemorrhage may be confused for enhancing tissue or pre-existing high density, especially when noncontrast phases are unavailable. Areas where dual energy imaging can be of most utility are solid organ bleeding, trauma, and vascular injury. We routinely employ DE post-processing for ER abdomen/pelvis CT to clarify iodine content and in turn better guide management.  

http://abstract.rsna.org/uploads/2014/14004737/14004737_sd8i.pdf

Bonci, G, Wortman, J, Fulwadhva, U, Sodickson, A, Dual Energy CT to Detect Active Extravasation in the Emergency Room Setting: Advantages over Conventional Contrast-Enhanced CT .  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14004737.html