RSNA 2014 

Abstract Archives of the RSNA, 2014


PHE023-b

CT Parameters and Image Quality: A Pictorial Essay

Education Exhibits

Presented in 2014

Participants

Karen Shaw Chen MD, Presenter: Nothing to Disclose
Eugenia Gold, Abstract Co-Author: Nothing to Disclose
Mark Norell PhD, Abstract Co-Author: Nothing to Disclose
Nolan J. Kagetsu MD, Abstract Co-Author: Spouse, Employee, Pfizer Inc

TEACHING POINTS

How does changes in CT parameters improve image quality - changes in field of view, mA, kVp, slice thickness.  In collaboration with a natural history museum, the effect of varying parameters on image quality will be illustrated through the large differences in parameters between medical grade and archeological grade CT scanners.  This is a pictoral essay on the physics behind CT image acquisition.      

TABLE OF CONTENTS/OUTLINE

CT parameters will be illustrated in quiz format.  Two images will be shown of the same item and the differences in image quality will be attributed to a CT parameter and described in terms of noise, low contrast, and spatial resolution. 1. mA: two different images will depict changes in osseous detail 2. kVp: two different soft tissue images with drastically different kVp 3. field of view: different images with two different fields of view 4. pitch: reconstructed images of the same thickness using different pitch 5. slice thickness: how resolution changes with different slice thicknesses Image quality will be then related to patient dose with changes in CT parameters.

PDF UPLOAD

http://abstract.rsna.org/uploads/2014/14003556/14003556_b8p5.pdf

Cite This Abstract

Chen, K, Gold, E, Norell, M, Kagetsu, N, CT Parameters and Image Quality: A Pictorial Essay.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14003556.html