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Proceedings Paper

Projection-based adaptive scatter correction for CT system
Author(s): Yang Wang; Guoqing Zhang; Yi Tian
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Paper Abstract

In CT system, the distance between the scanned object and the detector gives a significant impact on the total scatter intensity arriving at the detector. As a result, if an object is scanned off-center, its relative distance to the detector is changing when CT system is rotating, and the detector received scatter intensity will also be changing throughout the scan. In general only after the location information is obtained from the entire 360 degree raw data, the precise scatter radiation can be predicted. This could slow down reconstruction performance a lot. In this paper, we would like to propose a purely projection based scatter correction algorithm, which can be processed independently inside each projection. The promising results of the proposed algorithm suggests the variance of scatter received at different locations could be well predicted, meanwhile the reconstruction speed could be well maintained.

Paper Details

Date Published: 16 March 2020
PDF: 6 pages
Proc. SPIE 11312, Medical Imaging 2020: Physics of Medical Imaging, 113122X (16 March 2020); doi: 10.1117/12.2548919
Show Author Affiliations
Yang Wang, Siemens Shanghai Medical Equipment Ltd. (China)
Guoqing Zhang, Siemens Shanghai Medical Equipment Ltd. (China)
Yi Tian, Siemens Shanghai Medical Equipment Ltd. (China)

Published in SPIE Proceedings Vol. 11312:
Medical Imaging 2020: Physics of Medical Imaging
Guang-Hong Chen; Hilde Bosmans, Editor(s)

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