Abed Ghandour MD, Abstract Co-Author: Nothing to Disclose

Rong Rong MD, Abstract Co-Author: Institutional Grant support, Koninklijke Philips NV

Prabhakar Rajiah MD, FRCR, Presenter: Institutional Research Grant, Koninklijke Philips NV

1. With dual energy CT, virtual monochromatic images of any energy can be generated from low and high energy data 2. Generation of virtual monochromatic images can be performed either in the projection or image domains (projection domain- rapid kv switching, dual layers; image domain- dual source) 3. There are several clinical applications of virtual monochromatic imaging- including artifact reduction and optimizing contrast 4. Equivalent monochromatic images- with same mean energy and radiation of polychromatic image, has higher image quality and lower artifacts  

- Virtual monochromatic imaging- Definition, physics - Generation of virtual monochromatic images from different technologies, including dual layer - Projection vs. image based methods- Technique, advantages, disadvantages - Phantom studies illustrating the concept of virtual monochromatic images - Clinical applications with illustrative cases - Monochromatic low keV images- For boosting contrast in vascular structures- with suboptimal bolus/decreased contrast dose - Monochromatic high keV imaging- For reducing artifacts- Beam hardening, metal artifact, calcium blooming - Virtual non contrast using material decomposition- Radiation dose saving - Virtual calcium score - Material differentiation

http://abstract.rsna.org/uploads/2014/14000265/14000265_p8iy.pdf

Ghandour, A, Rong, R, Rajiah, P, Virtual Monochromatic Imaging Using Dual Energy CT—Principles and Clinical Applications.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14000265.html