Rishi Mhapsekar MD, Presenter: Nothing to Disclose

Marilyn J. Siegel MD, Abstract Co-Author: Research Consultant, Siemens AG Speakers Bureau, Siemens AG

Juan Carlos Ramirez Giraldo PhD, Abstract Co-Author: Employee, Siemens AG

1. Review technical options that influence radiation exposure in CT angiography (CTA) 2. Describe automated technologies and software applications that will reduce radiation exposure in children undergoing CTA 3. Understand the effects on dose using these technologies in isolation and in combination  

1. Introduction Relationship between kilovoltage, milliamperage, and image quality Phantom results of lowering the primary CT parameters 2. Automated tube current modulation How to choose the appropriate reference image quality to achieve optimal dose reduction 3. Automated kilovoltage section How to choose the optimal kVp on the basis of the diagnostic task and patient habitus 4. Iterative image reconstruction How to choose the best level of iterative reconstruction and how to minimize the effect of altered image quality on CT images by use of smoothing kernels. 5. Image examples describing the use of these technologies in isolation and synergistically. 6. Summary data table (figure 5) demonstrating how the combination of technologies has consistently driven doses towards sub-mSv ranges in a routine fashion. Conclusion: Understanding recently developed scanning techniques is essential for optimization of pediatric imaging protocols designed to achieve the desired image quality with a reduce dose.  

http://abstract.rsna.org/uploads/2014/14008660/14008660_aeak.pdf

Mhapsekar, R, Siegel, M, Ramirez Giraldo, J, Image Right: Automated Strategies for Reducing Radiation Dose in Pediatric CT Angiography.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14008660.html