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Proceedings Paper

Image quality improvement and exposure dose reduction with the combined use of X-ray modulation and Boost3D
Author(s): Masahiro Kazama; Shinsuke Tsukagoshi; Miwa Okumura
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Paper Abstract

Multislice CT with a larger number of detector rows has recently become the mainstream. As a result, scanning with a thin slice thickness is more frequently performed. However, a large number of obvious raster-type artifacts occur when X-ray absorption in the lateral direction is extremely high, such as in the shoulder and the pelvis. There are two methods to solve this problem. In one method, X-ray output is modulated during rotation so that the exposure dose is increased in regions with high X-ray absorption and reduced in regions with low X-ray absorption. In the other method, regions that are responsible for artifacts are filter-processed using image processing to minimize artifacts. From the viewpoints of image quality and exposure dose, we have evaluated a method we have developed that combines X-ray modulation technology (X-ray Modulation) and artifact elimination processing (Boost3D). An acrylic elliptical phantom was used for evaluation. Assuming a constant image SD level, it was found that the exposure dose can be reduced by approximately 25% with the combined use of X-ray Modulation and Boost3D.

Paper Details

Date Published: 2 March 2006
PDF: 9 pages
Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 61422G (2 March 2006); doi: 10.1117/12.653092
Show Author Affiliations
Masahiro Kazama, Toshiba Medical Systems Corp. (Japan)
Shinsuke Tsukagoshi, Toshiba Medical Systems Corp. (Japan)
Miwa Okumura, Toshiba Medical Systems Corp. (Japan)

Published in SPIE Proceedings Vol. 6142:
Medical Imaging 2006: Physics of Medical Imaging
Michael J. Flynn; Jiang Hsieh, Editor(s)

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