Jianying Li, Presenter: Employee, General Electric Company

Xiaolei Tong, Abstract Co-Author: Employee, General Electric Company

Yun Shen PhD, Abstract Co-Author: Employee, General Electric Company Researcher, General Electric Company

1) To illustrate the limitations of using fixed tube voltage at 120kVp or 140kVp in CT imaging, especially for pediatric patients 2) To illustrate the advantages and disadvantages of using low kVp in CT imaging 3) To demonstrate strategies of selecting the kVp based on patient size and clinical tasks

1) Standard CT imaging and its limitations ・fixed tube voltage at 120kVp or 140kVp with mA modulation ・potentially higher contrast medium (CM) dose for adequate enhancement, especially in venography ・potentially higher radiation dose for adequate contrast-noise-ratio (CNR) 2) Pros and cons of using low kVp ・contrast improvement with low kVp in contrast enhanced CT scans ・lower dose efficiency and higher image noise with increased patient size at low kVp ・The use of iterative reconstruction (IR) for noise reduction 3) Optimal strategies using these technologies ・patient size and clinical task-dependent low kVp selection ・balancing noise and CNR based on clinical tasks ・proper IR strength for further reducing noise

http://abstract.rsna.org/uploads/2014/14007684/14007684_17w2.pdf

Li, J, Tong, X, Shen, Y, The Pros and Cons of Using Low kVp in CT Imaging.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14007684.html