Elizabeth H. Y. Du BA, BSc, Presenter: Nothing to Disclose

Savvas Nicolaou MD, Abstract Co-Author: Nothing to Disclose

Patrick McLaughlin FFR(RCSI), Abstract Co-Author: Nothing to Disclose

-Ultra-low-dose CT protocols have resulted in literature effective doses of 0.1 mSv, 0.2 mSv & 0.4 mSv in the chest, abdomen/thoracic spine & pelvis/lumbar spine, respectively -Three key developments have allowed for marked CT dose reductions: automated exposure control, iterative reconstruction technologies & improvements in detector design

-Adverse radiation effects from medical radiation exposure -Audit data of mean effective doses (MEDs) for plain chest, abdominal, thoracic spine, lumbar spine & pelvic radiographs from a level one ED; MEDs of ultra-low-dose CT trials in the literature -Imaging examples of ultra-low-dose CT to illustrate image quality -Theory behind automated exposure control in modulating tube current according to patient width & attenuation profile; algorithm for modulating CT voltage according to patient size & CT application -Theory behind & merits/disadvantages of iterative reconstruction technologies incl. filtered back projection & sinogram affirmed iterative reconstruction (SAFIRE Plus); application of SAFIRE Plus in imaging bariatric patients -Pitfalls of conventional solid-state detectors; 3rd generation CT detectors and reduced electronic noise; CT imaging examples from integrated circuit detectors vs. discrete circuit detectors -Significance of ultra-low-dose CT on ED imaging decision-making

http://abstract.rsna.org/uploads/2014/14016905/14016905_5sbt.pdf

Du, E, Nicolaou, S, McLaughlin, P, Achieving Ultra-Low-Dose CT in the ED with Exposures Equivalent to Plain Radiographs.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14016905.html