Abstract Archives of the RSNA, 2014
PHE023-b
CT Parameters and Image Quality: A Pictorial Essay
Education Exhibits
Presented in 2014
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
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.
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.
http://abstract.rsna.org/uploads/2014/14003556/14003556_b8p5.pdf
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